Reading Candlestick Charts for Event Contracts

A YES contract can only ever trade between $0.01 and $0.99. That single constraint changes how you should read candlestick charts on Kalshi or Polymarket compared to a stock or crypto chart — there's no unbounded upside candle, no gap-to-zero, just a probability ceiling and floor the price action bumps against. Reading candlestick charts on event contracts still uses the same building blocks — open, high, low, close, volume — but the interpretation shifts because every candle is really plotting a crowd's changing confidence in a yes/no outcome, not an asset's changing value.

What a candle actually shows on a $0.01-$0.99 chart

Each candle plots four prices for its interval: open (price at the start), close (price at the end), high (the peak reached), low (the trough reached). The body is the range between open and close; color (or fill) shows whether the close was higher or lower than the open. On an event contract this body is telling you how the crowd's probability estimate moved over that interval — a green candle on a midterm Senate market means the market grew more confident in that outcome during that window, nothing more exotic than that.

Because price is bounded at $0.01 and $0.99, candles compress as a market approaches certainty. A contract grinding from $0.90 toward $0.98 in the days before resolution will show smaller and smaller candle bodies even as the underlying event becomes more certain — that's the probability curve flattening out near its ceiling, not a loss of interest.

Wicks: the tell on thin books

Wicks show the high and low that didn't hold as the close. On a liquid market — say a Fed-decision Kalshi contract in the hours before an announcement — a long wick usually reflects genuine two-sided flow testing a level. On a thinner event contract, a long wick is more often a symptom of a shallow order book: one moderately sized order lifts the ask from $0.55 to $0.68, prints, and then price snaps back to $0.56 once the resting liquidity refills. Reading wick length against the market's typical volume tells you which situation you're in — a long wick on normal volume is a real repricing; a long wick on a volume spike from one or two prints is a liquidity gap, not new information.

Volume: contracts, not shares

Volume under an event-contract candle counts contracts traded, where each contract represents a $1 payout at resolution. A candle showing 40,000 contracts of volume on a Kalshi weather market is meaningfully more significant than the same volume on a headline midterm market, simply because baseline liquidity differs so much by category — weather and economic-release markets tend to run thinner than the flagship political contracts. Always read volume relative to that specific market's recent average, not against some universal benchmark.

Point of Control (POC)

Point of Control is the single price level where the most contracts changed hands across a session, not necessarily where the candle closed. Suppose a Kalshi contract on a specific CPI print ranges between $0.38 and $0.51 through the day but the bulk of volume clusters around $0.44 — that $0.44 level is the POC, and it's a more meaningful reference point than the day's high or low because it's where two-sided conviction actually built up. Price returning to test a prior session's POC after moving away from it is a common pattern worth watching, especially heading into a scheduled catalyst like a Fed statement or a jobs report.

Cumulative Volume Delta (CVD)

CVD is the running total of aggressive buy volume (orders that lift the ask) minus aggressive sell volume (orders that hit the bid), plotted alongside price. It's the clearest way to see whether a move is backed by real taker conviction. If a contract's price is flat but CVD is climbing steadily, buyers are absorbing supply at that level without price moving yet — a setup some traders watch for a breakout. If price is grinding higher but CVD is flat or falling, the move may be happening on thin resting size rather than genuine buying pressure, which matters if you're sizing a position off that trend.

Open interest: the missing fourth dimension

Candles and CVD tell you about trading activity; open interest tells you about standing exposure. Rising open interest with a rising price generally means new capital is entering the trend and agreeing with it. A price move on falling open interest usually means existing positions are closing out — the move is a squeeze or unwind, not fresh conviction. Reading candle action next to an open-interest trend line separates "the market is genuinely repricing this event" from "positions are just being cleared before resolution."

Putting it together on Kalshi

Kalshi's own interface surfaces price history and open interest per market, but reconstructing POC and CVD from raw API pulls (api.elections.kalshi.com/trade-api/v2) is real engineering work most traders don't want to do live. PolyMarketMaker ships dedicated Kalshi candle, open-interest, POC, and CVD tabs so the read described above — body, wick, volume, POC, CVD, open interest — is available on one screen instead of five spreadsheets. The same candle and volume tooling runs on Polymarket US and Polymarket global markets, useful when you're checking whether a Kalshi move is echoed on Polymarket's order book for the same event. PolyMarketMaker is $149/mo for Simulation, $299/mo for Live Trading.

Where to go next

Candle reading is one input into a broader read of the tape — pair it with order-flow trading techniques for a fuller picture of who's actually driving a move. For the Kalshi-specific version of this material, including screenshots of the open-interest tab layout, see Kalshi charts and open interest. And if you're building a systematic approach around these signals, Kalshi trading strategies covers how traders combine chart reads with fee-aware position sizing. POC and CVD are also core inputs for quoting a two-sided market rather than just taking a directional position — see market making explained for how liquidity providers use the same volume signals differently than directional traders do.

FAQ

What is a candlestick chart in prediction markets?

A chart plotting open, high, low, and close price per interval, same as a stock chart, but bounded between $0.01 and $0.99 since that range is the contract's implied probability.

What do wicks mean on event contract candles?

They show a high or low that didn't hold as the close. On thin markets, long wicks are often a shallow order book getting briefly lifted and refilling, not a genuine repricing.

What is Point of Control (POC) on an event contract chart?

The single price level where the most contracts traded in a session — where the market's conviction actually clustered, as distinct from the session's high or low.

What is Cumulative Volume Delta and how do I use it on event contracts?

CVD nets aggressive buy volume against aggressive sell volume over time. Rising CVD with flat price can signal accumulation; falling CVD into a rising price can signal a move running out of real buying pressure.

Does Kalshi show candlestick charts and open interest?

Yes, Kalshi's interface shows price history and open interest per market. Terminals like PolyMarketMaker add dedicated POC and CVD overlays on top of that raw data.

This article is for educational purposes only and is not financial advice. Trading involves risk of loss.