# Altcoin Season Index — Top 50 vs BTC 90-Day Performance (`gochujang/altcoin-season-index`) Actor

Computes the Altcoin Season Index: what % of top-50 coins outperformed BTC over 90 days. Returns per-coin comparison, beat/miss flag, and aggregate score. Score ≥75 = altcoin season, ≤25 = BTC season. No API key required.

- **URL**: https://apify.com/gochujang/altcoin-season-index.md
- **Developed by:** [Hojun Lee](https://apify.com/gochujang) (community)
- **Categories:** Developer tools, Automation, Other
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

Pay per usage

This Actor is paid per platform usage. The Actor is free to use, and you only pay for the Apify platform usage, which gets cheaper the higher subscription plan you have.

Learn more: https://docs.apify.com/platform/actors/running/actors-in-store#pay-per-usage

## What's an Apify Actor?

Actors are a software tools running on the Apify platform, for all kinds of web data extraction and automation use cases.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.

In JavaScript/TypeScript projects, use official [JavaScript/TypeScript client](https://docs.apify.com/api/client/js.md):

```bash
npm install apify-client
```

In Python projects, use official [Python client library](https://docs.apify.com/api/client/python.md):

```bash
pip install apify-client
```

In shell scripts, use [Apify CLI](https://docs.apify.com/cli/docs.md):

````bash
# MacOS / Linux
curl -fsSL https://apify.com/install-cli.sh | bash
# Windows
irm https://apify.com/install-cli.ps1 | iex
```bash

In AI frameworks, you might use the [Apify MCP server](https://docs.apify.com/platform/integrations/mcp.md).

If your project is in a different language, use the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).


# README

## Altcoin Season Index

Track the **Altcoin Season Index** — what percentage of the top 50 cryptocurrencies outperformed Bitcoin over the last 90 days. The definitive indicator for crypto market cycle positioning. **No API key required.**

### What Is Altcoin Season?

> If 75% or more of the top 50 coins have outperformed Bitcoin over the last 90 days → **Altcoin Season** 🔥  
> If 25% or fewer have → **Bitcoin Season** ₿  
> Everything in between → **Neutral/Mixed**

This metric (popularized by [blockchaincenter.net](https://www.blockchaincenter.net/en/altcoin-season-index/)) is one of the most-watched cycle indicators in crypto trading.

### What You Get

**Per coin (dataset rows):**
- `rank` — market cap rank
- `symbol`, `name`
- `change_90d_pct` — 90-day price change (%)
- `btc_change_90d_pct` — BTC's 90d change (the baseline)
- `beat_btc` — true/false
- `outperformance_pct` — how much the coin beat/missed BTC
- `market_cap_usd`, `current_price_usd`

**SUMMARY (key-value store):**
- `altcoin_season_score` — 0 to 100
- `season_label` — `altcoin_season` / `bitcoin_season` / `neutral`
- `altcoins_beating_btc` / `altcoins_analyzed`
- `top_5_outperformers` — best performing altcoins vs BTC
- `bottom_5_underperformers` — worst performing vs BTC

### Sample Output

**Dataset row:**
```json
{
  "rank": 5,
  "symbol": "SOL",
  "name": "Solana",
  "change_90d_pct": 62.4,
  "btc_change_90d_pct": 18.2,
  "beat_btc": true,
  "outperformance_pct": 44.2,
  "market_cap_usd": 78500000000
}
````

**SUMMARY:**

```json
{
  "altcoin_season_score": 68,
  "season_label": "neutral",
  "btc_change_90d_pct": 18.2,
  "altcoins_beating_btc": 34,
  "altcoins_analyzed": 50,
  "top_5_outperformers": [
    {"symbol": "SUI", "outperformance_pct": 112.5},
    {"symbol": "TAO", "outperformance_pct": 89.3}
  ]
}
```

### Input Parameters

| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `topN` | Integer | 50 | Number of top coins to analyze (10–250) |
| `excludeStablecoins` | Boolean | true | Remove USDT, USDC, DAI etc. |
| `excludeBtcWbtc` | Boolean | true | Exclude BTC and WBTC from altcoin set |

### Pricing

**Pay-Per-Event: $0.003 per run**

Each execution costs $0.003 regardless of how many coins you analyze.

### No API Key Required

Data from [CoinGecko's public API](https://www.coingecko.com/en/api) — free, no authentication required.

### Use Cases

- **Cycle timing** — rotate from BTC into alts when altcoin season starts
- **Portfolio allocation** — increase altcoin exposure when score > 75
- **Market reports** — track weekly altcoin season score over time
- **Trading bots** — adjust strategy based on current market regime
- **Alerts** — schedule this actor to detect season transitions

### Technical Details

- **Runtime**: Python 3.12 on Apify
- **Data source**: CoinGecko `/coins/markets` (free tier)
- **Typical run time**: ~10 seconds for top 50

# Actor input Schema

## `topN` (type: `integer`):

Number of top coins to analyze (by market cap). Standard altcoin season uses 50.

## `excludeStablecoins` (type: `boolean`):

Remove USDT, USDC, DAI etc. from the comparison set.

## `excludeBtcWbtc` (type: `boolean`):

Exclude Bitcoin and Wrapped Bitcoin from the altcoin set.

## Actor input object example

```json
{
  "topN": 50,
  "excludeStablecoins": true,
  "excludeBtcWbtc": true
}
```

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {};

// Run the Actor and wait for it to finish
const run = await client.actor("gochujang/altcoin-season-index").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = {}

# Run the Actor and wait for it to finish
run = client.actor("gochujang/altcoin-season-index").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print("💾 Check your data here: https://console.apify.com/storage/datasets/" + run["defaultDatasetId"])
for item in client.dataset(run["defaultDatasetId"]).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{}' |
apify call gochujang/altcoin-season-index --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "command": "npx",
            "args": [
                "mcp-remote",
                "https://mcp.apify.com/?tools=gochujang/altcoin-season-index",
                "--header",
                "Authorization: Bearer <YOUR_API_TOKEN>"
            ]
        }
    }
}

```

## OpenAPI specification

```json
{
    "openapi": "3.0.1",
    "info": {
        "title": "Altcoin Season Index — Top 50 vs BTC 90-Day Performance",
        "description": "Computes the Altcoin Season Index: what % of top-50 coins outperformed BTC over 90 days. Returns per-coin comparison, beat/miss flag, and aggregate score. Score ≥75 = altcoin season, ≤25 = BTC season. No API key required.",
        "version": "0.1",
        "x-build-id": "MEY3VJaZgD1X8iXvN"
    },
    "servers": [
        {
            "url": "https://api.apify.com/v2"
        }
    ],
    "paths": {
        "/acts/gochujang~altcoin-season-index/run-sync-get-dataset-items": {
            "post": {
                "operationId": "run-sync-get-dataset-items-gochujang-altcoin-season-index",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor, waits for its completion, and returns Actor's dataset items in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK"
                    }
                }
            }
        },
        "/acts/gochujang~altcoin-season-index/runs": {
            "post": {
                "operationId": "runs-sync-gochujang-altcoin-season-index",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor and returns information about the initiated run in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/runsResponseSchema"
                                }
                            }
                        }
                    }
                }
            }
        },
        "/acts/gochujang~altcoin-season-index/run-sync": {
            "post": {
                "operationId": "run-sync-gochujang-altcoin-season-index",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK"
                    }
                }
            }
        }
    },
    "components": {
        "schemas": {
            "inputSchema": {
                "type": "object",
                "properties": {
                    "topN": {
                        "title": "Top N Coins",
                        "minimum": 10,
                        "maximum": 250,
                        "type": "integer",
                        "description": "Number of top coins to analyze (by market cap). Standard altcoin season uses 50.",
                        "default": 50
                    },
                    "excludeStablecoins": {
                        "title": "Exclude Stablecoins",
                        "type": "boolean",
                        "description": "Remove USDT, USDC, DAI etc. from the comparison set.",
                        "default": true
                    },
                    "excludeBtcWbtc": {
                        "title": "Exclude BTC & WBTC",
                        "type": "boolean",
                        "description": "Exclude Bitcoin and Wrapped Bitcoin from the altcoin set.",
                        "default": true
                    }
                }
            },
            "runsResponseSchema": {
                "type": "object",
                "properties": {
                    "data": {
                        "type": "object",
                        "properties": {
                            "id": {
                                "type": "string"
                            },
                            "actId": {
                                "type": "string"
                            },
                            "userId": {
                                "type": "string"
                            },
                            "startedAt": {
                                "type": "string",
                                "format": "date-time",
                                "example": "2025-01-08T00:00:00.000Z"
                            },
                            "finishedAt": {
                                "type": "string",
                                "format": "date-time",
                                "example": "2025-01-08T00:00:00.000Z"
                            },
                            "status": {
                                "type": "string",
                                "example": "READY"
                            },
                            "meta": {
                                "type": "object",
                                "properties": {
                                    "origin": {
                                        "type": "string",
                                        "example": "API"
                                    },
                                    "userAgent": {
                                        "type": "string"
                                    }
                                }
                            },
                            "stats": {
                                "type": "object",
                                "properties": {
                                    "inputBodyLen": {
                                        "type": "integer",
                                        "example": 2000
                                    },
                                    "rebootCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "restartCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "resurrectCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "computeUnits": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            },
                            "options": {
                                "type": "object",
                                "properties": {
                                    "build": {
                                        "type": "string",
                                        "example": "latest"
                                    },
                                    "timeoutSecs": {
                                        "type": "integer",
                                        "example": 300
                                    },
                                    "memoryMbytes": {
                                        "type": "integer",
                                        "example": 1024
                                    },
                                    "diskMbytes": {
                                        "type": "integer",
                                        "example": 2048
                                    }
                                }
                            },
                            "buildId": {
                                "type": "string"
                            },
                            "defaultKeyValueStoreId": {
                                "type": "string"
                            },
                            "defaultDatasetId": {
                                "type": "string"
                            },
                            "defaultRequestQueueId": {
                                "type": "string"
                            },
                            "buildNumber": {
                                "type": "string",
                                "example": "1.0.0"
                            },
                            "containerUrl": {
                                "type": "string"
                            },
                            "usage": {
                                "type": "object",
                                "properties": {
                                    "ACTOR_COMPUTE_UNITS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_WRITES": {
                                        "type": "integer",
                                        "example": 1
                                    },
                                    "KEY_VALUE_STORE_LISTS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_INTERNAL_GBYTES": {
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                                        "example": 0
                                    },
                                    "DATA_TRANSFER_EXTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_SERPS": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            },
                            "usageTotalUsd": {
                                "type": "number",
                                "example": 0.00005
                            },
                            "usageUsd": {
                                "type": "object",
                                "properties": {
                                    "ACTOR_COMPUTE_UNITS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_READS": {
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                                    "DATASET_WRITES": {
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                                    },
                                    "KEY_VALUE_STORE_READS": {
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                                    },
                                    "KEY_VALUE_STORE_WRITES": {
                                        "type": "number",
                                        "example": 0.00005
                                    },
                                    "KEY_VALUE_STORE_LISTS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_READS": {
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                                        "example": 0
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                                        "example": 0
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                                    "DATA_TRANSFER_INTERNAL_GBYTES": {
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                                    },
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                                        "example": 0
                                    },
                                    "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_SERPS": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}
```
