id | string | Trade.trade_id | Trade.transactionHash | kalshi: Kalshi-issued unique trade id; rows missing this are dropped at parse time. polymarket: Polygon transaction hash; doubles as trade id since one trade lands per tx. |
price | number (double) | Trade.yes_price_dollars, fallback Trade.no_price_dollars | Trade.price | kalshi: Yes-anchored: parsed from yes_price_dollars and normalized to a probability in [0, 1]. polymarket: Decimal probability for the row’s outcome token in [0, 1]. |
size | number (double) | Trade.count_fp | Trade.size | kalshi: FixedPointCount string parsed to f64. polymarket: Non-negative size in contracts. |
aggressor_side | string? | Trade.taker_side | synthetic | kalshi: Yes-anchored: taker_side=yes → buy, taker_side=no → sell. polymarket: Yes-anchored from {Trade.side, Trade.outcome} — BUY of Yes or SELL of No → buy. |
outcome | string? | synthetic | Trade.outcome | kalshi: Title-cased from taker_side (the upstream Trade has no top-level outcome). polymarket: Outcome label as published by Polymarket. |
yes_price | number? (double) | Trade.yes_price_dollars | synthetic | kalshi: Direct Yes-side reference; equal to canonical price. polymarket: Set to Trade.price when the row’s outcome is Yes; null otherwise. |
no_price | number? (double) | Trade.no_price_dollars | synthetic | kalshi: Direct No-side reference; do not derive as 1 - yes_price (mirror identity does not hold per trade). polymarket: Set to Trade.price when the row’s outcome is No; null otherwise. |
taker_address | string? | omitted | Trade.proxyWallet | kalshi: Kalshi public tape exposes no wallet identifiers. polymarket: On-chain proxy wallet of the taker (takerOnly=true is hardcoded on the underlying call). |
exchange_ts | string (date-time) | Trade.created_time | Trade.timestamp | kalshi: RFC3339 string parsed to UTC. polymarket: Unix seconds (not milliseconds) parsed to UTC. |
openpx_ts | string (date-time) | synthetic | synthetic | kalshi: Wall-clock UTC stamped once per page at response serialization. polymarket: Wall-clock UTC stamped once per page at response serialization. |
