Prediction market orderflow and footprint charts for Polymarket

What orderflow means in prediction markets

Orderflow is the record of executed trades — how much volume traded, at what price, and which side was the aggressor — rather than the smoothed line you see on a default probability chart. In a prediction market, price is a probability: a share that pays $1 if an event resolves YES trades somewhere between 0 and 1 (often quoted as cents, 0 to 100). Orderflow tools let you see how that probability was built, trade by trade.

TruthTickTerminal reconstructs this from the live Polymarket trade stream. Instead of asking only 'what is the implied probability now?', orderflow lets you ask 'where did size actually change hands, and who was leaning on the market to get filled?' That distinction is the whole point of footprint and volume-at-price analysis.

• Volume: how many contracts traded at each price level, not just the last price.
• Delta: the net of buy-side vs sell-side aggression, tracked cumulatively.
• Price acceptance: levels where the market spent real volume vs levels it passed through.

Why binary contracts are different from futures and crypto

Most orderflow education comes from futures and crypto, where price is open-ended and can run for hundreds of points. A Polymarket binary is bounded: it lives between 0 and 1 and is pinned to a real-world resolution. That changes how flow behaves. Near the extremes — say 0.03 or 0.97 — the market is mostly pricing tail risk, spreads widen, and a small number of trades can move the implied probability a lot in percentage terms.

Resolution is also a hard wall. As an event approaches its outcome, flow can compress around a level or gap violently on news, because there is a known endpoint rather than an open-ended trend. Reading orderflow on a binary means respecting those boundaries: a 'breakout' through 0.90 is not the same animal as a breakout in an unbounded instrument, and volume that clusters near 0.50 often reflects genuine disagreement rather than indecision.

• Bounded range 0 to 1 — moves compress near the extremes.
• A fixed resolution date acts as a terminal magnet for price.
• Liquidity and spread vary far more market-to-market than in major futures.

YES volume vs NO volume

Every binary market has two mirrored sides: a YES share and a NO share whose prices sum to roughly $1. Buying YES is economically close to selling NO, so flow on one side has a counterpart on the other. TruthTickTerminal lets you flip the chart between the YES and NO side so you can read the book from whichever perspective matters for your thesis.

Reading YES volume against NO volume is about finding where conviction is concentrated. Heavy YES buying that lifts price into a level, met by heavy NO buying that absorbs it, shows a contested level — both sides are committing size. The footprint cells make that visible: you can see whether a price level was driven by aggressive YES buyers, soaked up by NO buyers, or thinly traded by neither.

• Flip YES/NO to read the same market from either side.
• Mirrored pricing means YES and NO flow are two views of one fight.
• Concentrated size on one side at a level signals conviction; absorption signals a defended level.

Volume-at-price and price acceptance

Volume-at-price answers a simple question: at which probabilities did this market actually do business? The Volume Profile renders that as a horizontal histogram, and the POC (point of control) marks the single price level with the most traded volume — the level the market accepted most. High-volume-node (HVN) zones highlight bands where a lot of trade clustered; the market tends to treat those as fair-value areas it returns to.

Acceptance vs rejection is the read. When price spends real volume at a level and keeps trading there, the market is accepting that probability as fair. When price spikes to a level on thin volume and snaps back, it was rejected — the move had no participation behind it. Pairing Volume Profile and HVN zones with naked swing levels and VWAP bands gives you a structured way to mark where a prediction market found agreement and where it did not.

• Volume Profile histogram + POC line show the most-accepted probability.
• HVN zones mark fair-value bands the market keeps revisiting.
• Thin, quickly-reversed spikes flag rejection rather than acceptance.

Footprint-style prediction-market charts

A footprint chart opens up each bar to show buy vs sell volume at every price level inside it, instead of collapsing the bar to a single open-high-low-close. TruthTickTerminal's footprint is built specifically for prediction-market trade flow and runs live on real Polymarket data — it is not a mock or a static image. As trades print, the cells fill in and the forming bar updates.

It pairs naturally with tick candles, where each bar represents a fixed number of executed trades (1T, 5T, 10T, 25T, 50T, 100T) rather than a fixed amount of time. In thin or bursty prediction markets, tick bars keep the chart informative during quiet stretches and detailed during fast ones, so the footprint reflects activity rather than the clock. Layer cumulative delta on top to track whether net aggression is building toward YES or NO.

• Per-price-level buy vs sell cells, live on Polymarket flow.
• Tick candles (1T to 100T) so each bar is N trades, not N minutes.
• Cumulative delta to track net buy/sell pressure over a move.

How traders can use this data

Traders use orderflow as a confirmation and context layer, not a signal generator. Before taking a view, you can check whether a level has been accepted (real volume sitting at it) or merely touched. You can watch whether a push toward YES is backed by genuine aggression in the delta or is fading on absorption. You can mark HVN zones and the POC as reference levels and see how price behaves around them.

For systematic builders, the same data feeds research. The Pro tier includes a strategy lab where you write backtest logic in TypeScript against historical Polymarket trade data, a scanner that runs a strategy across 20,000+ markets ranked by net P&L, custom indicators you write in JavaScript that run live on the chart, and a Resolved-markets tab. A continuous background collector ingests trades across those markets so historical candles are ready when you open a chart. Execution still happens on Polymarket — the terminal is for research and analysis.

• Confirm acceptance vs a thin touch before committing to a level.
• Read delta to see whether a move has real aggression behind it.
• Write custom JS indicators and TypeScript backtests on the same trade data (Pro, $19.99/mo).

Limits and risks

Orderflow is descriptive, not predictive. It tells you what already happened in the tape; it does not guarantee what happens next, and there is no guaranteed alpha or profit in any of these tools. Prediction markets can be thin, and in low-liquidity markets a footprint or Volume Profile built on a handful of trades is noisy — small samples lie. Always weigh how much volume a read is actually based on.

Binary markets also carry resolution and news risk that no chart can see coming: an event can resolve or gap on information that never appears in prior flow. Wide spreads near the extremes can make executed prices look more decisive than the real liquidity supports. Treat orderflow as one honest input among several, size positions for the possibility you are wrong, and remember the terminal is a research tool — you place trades yourself on Polymarket.

• No tool here promises profit or alpha — orderflow describes the past.
• Thin markets produce noisy footprints; small samples mislead.
• Resolution and news risk live outside the tape entirely.

Why it matters

A default probability line tells you where a market closed. Orderflow tells you how it got there and how much conviction was behind each move — which is exactly the information that separates a level the market defends from a number it printed on no volume. For prediction-market traders, that context is the edge that a single line cannot provide.

Bringing footprint charts, Volume Profile, YES/NO flow, and cumulative delta to Polymarket in one independent terminal means you can analyze prediction markets with the same depth futures and crypto traders take for granted — honestly, on live data, starting free. That is why orderflow matters here: it turns a probability into a story you can actually read.