Position Metrics

Event: position_metrics
Endpoint: wss://api.struct.to/ws/alerts
Cost: 0.1 credits per event

Get notified when a position’s volume or price metrics cross a threshold. This event supports a wide range of filters for volume, fees, trader counts, and price or probability changes.

Filters

Filter	Type	Required	Description
`position_ids`	string[]	No	Restrict to specific positions (max 500)
`condition_ids`	string[]	No	Restrict to specific conditions (max 500)
`outcomes`	string[]	No	Filter by outcome name, e.g. `["Yes", "No"]` (max 500)
`min_volume_usd`	number	No	Minimum volume in USD
`max_volume_usd`	number	No	Maximum volume in USD
`min_buy_usd`	number	No	Minimum buy volume in USD
`min_sell_volume_usd`	number	No	Minimum sell volume in USD
`min_fees`	number	No	Minimum fees in USD
`min_txns`	number	No	Minimum transaction count
`min_unique_traders`	number	No	Minimum unique trader count
`min_price_change_pct`	number	No	Minimum price change percentage
`min_probability_change_pct`	number	No	Minimum probability change percentage
`timeframes`	string[]	No	Timeframe windows: `1m`, `5m`, `30m`, `1h`, `6h`, `24h`, `7d`, `30d` (max 500)

{
  "op": "subscribe",
  "event": "position_metrics",
  "min_volume_usd": 500,
  "outcomes": ["Yes"],
  "timeframes": ["5m", "30m"]
}

Response

Volume on Polymarket vs. Struct. Polymarket’s UI reports “volume” as notional (the count of shares or contracts traded), which corresponds to shares_volume in Struct payloads. usd_volume is the dollar value of those trades. Use shares_volume to match figures shown on Polymarket and usd_volume for true USD throughput.

{
  "event": "position_metrics",
  "timestamp": 1775913505260,
  "data": {
    "position_id": "0xabc123",
    "outcome": "Yes",
    "outcome_index": 0,
    "timeframe": "5m",
    "volume_usd": 3420.75,
    "buy_volume_usd": 2100.00,
    "sell_volume_usd": 1320.75,
    "shares_volume": 5260.0,
    "shares_buy_volume": 3230.0,
    "shares_sell_volume": 2030.0,
    "builder_usd_volume": 860.0,
    "builder_usd_buy_volume": 540.0,
    "builder_usd_sell_volume": 320.0,
    "builder_shares_volume": 1320.0,
    "builder_shares_buy_volume": 830.0,
    "builder_shares_sell_volume": 490.0,
    "fees": 34.20,
    "builder_fees": 8.6,
    "txns": 18,
    "buys": 12,
    "sells": 6,
    "builder_txns": 5,
    "builder_buys": 3,
    "builder_sells": 2,
    "unique_traders": 9,
    "unique_builder_traders": 3,
    "price_open": 0.62,
    "price_close": 0.65,
    "price_high": 0.67,
    "price_low": 0.60,
    "probability_open": 0.61,
    "probability_close": 0.64,
    "probability_high": 0.66,
    "probability_low": 0.59,
    "avg_trade_shares": 292.22,
    "avg_buy_shares": 269.17,
    "avg_sell_shares": 338.33
  }
}

Each payload includes builder-attributed counterparts for volume, fees, transactions, and unique traders, with separate buy and sell breakdowns. avg_trade_shares, avg_buy_shares, and avg_sell_shares report the average size of trades, buys, and sells in the window.

Introduction

Rooms

Alerts

Filters

Response

​Filters

​Subscribe

​Response

Filters

Subscribe

Response