Order book, depth & trade history
How to read the Polymarket price chart, market depth, and trade history inside an Insider Pick's detail panel — and what each view tells you about a wallet's conviction and timing.
The microstructure view
When you open an Insider Pick, the detail panel shows three Polymarket-native data sections below the signal stats: a price chart, a market depth display, and a trade history log. Together they let you assess not just what a qualified wallet bet but how the market has moved since, where buying pressure currently sits, and whether the wallet built its position at a single price or over multiple fills.
These sections appear on every Pick, including Unmapped Picks (Polymarket-only markets with no matching sportsbook line). On Unmapped Picks they are the primary data available, since no cross-book comparison exists.
Price chart
The Price History chart plots the Polymarket contract price in cents over time (0¢ = 0% implied probability, 100¢ = 100%). Four time range tabs let you zoom in or out: 1D, 1W, 1M, and MAX.
Two reference points are overlaid on the chart:
- A dashed horizontal line at the wallet's entry price — the average price it paid across all its fills on this contract.
- A dot at the current price — the last traded price on the Polymarket order book.
If the wallet's trade history is available, each individual fill is also plotted as a diamond marker: green for BUY fills, red for SELL fills. Hovering over a fill marker shows the price in cents and in your preferred odds format, along with the dollar amount of that fill. This lets you see whether the wallet entered gradually as the market moved or made a single decisive bet.
Market Depth
The Market Depth section shows the live Polymarket order book, refreshed every ten seconds. It displays up to four price levels on each side, asks above and bids below. Each row shows:
- Price — expressed in cents (0–100¢), so a 67¢ ask means the seller wants to be paid at 67% implied probability.
- Bar — a proportional bar showing the dollar size at that level relative to the largest level visible. Asks are shown in red; bids in green.
- Size — the total dollar value resting at that price level.
Asks are sellers willing to offer the YES outcome. Bids are buyers willing to take it. A deep, tightly spaced bid stack below the current price suggests strong demand and limits how far the price can fall; a thin ask side means there is little resistance to the price rising further. A wide gap between the best bid and best ask (the spread) means liquidity is thin and a new buyer would move the price more to fill.
Only the four closest levels are shown
The depth display caps at four price levels per side so it fits the panel. The raw order book may have more levels, but the closest four are most relevant to where a trade would execute.
Trade History
The Trade History section lists the wallet's confirmed fills on this specific Polymarket contract — every trade the wallet executed, not just the qualifying position. Each row shows:
- Side — BUY (green) or SELL (red).
- Timestamp — the date and time of the fill, formatted as month, day, and time.
- Price and odds — the fill price in cents alongside the equivalent odds in your preferred format.
- Amount — the dollar value of that fill.
The section header shows a count of total fills. When fills are present, it also shows the wallet's average price across all fills and the total dollar amount wagered. A wallet that placed many small buys at rising prices was willing to chase conviction; one that placed a single large buy at a low early price caught the market before consensus formed.
Pair trade history with the price chart
Cross-referencing fills against the price chart shows whether the wallet entered before or after the price moved. Entry before a significant price rise is a stronger signal than entry after the move was already priced in.
Putting it together
The price chart, depth, and trade history are all sourced live from Polymarket. They answer three distinct questions about conviction and timing: where the wallet entered relative to fair value (chart), how much demand is resting at current levels (depth), and whether the wallet built its position deliberately or all at once (trade history). None of these views predict the outcome — they give context for evaluating whether the wallet's bet was well-timed and whether the market currently supports or contradicts the pick.
For a broader understanding of the Insiders feature, see What Insiders is, Picks and confidence, and Wallets and leaderboard.
- Odds, prices, expected value, conversion rates, and profit figures shown are estimates based on the last data we retrieved. They can change at any time — confirm the current price at the book before you bet, as odds may move and entry errors can occur.
- Any numbers, screenshots, and worked examples shown are illustrative only. They are not representative of typical results and your results may differ.