The 80% rule
A Market Profile rule: if price opens outside yesterday's value area and then spends two 30-minute periods back inside it, it often travels across the whole value area.
Watch it play out
Replay plays a setup this strategy already finished and stops so you can call it. Live watches for the next one on Bitcoin (BTC-USD, 1-minute candles). Either way a setup is marked only when a candle closes, then it's locked and plays out to its target or its stop. Nothing to trade here.
How the live chart applies the rules
- 1-minute candles. The chart runs every strategy on 1-minute Bitcoin candles from Coinbase, whatever timeframe the strategy page suggests. Times are New York time.
- Closed candles only. Levels, triggers and stops are read when a candle closes. Entry is that candle's close.
- One setup at a time. While a setup is playing out, the same strategy doesn't start another.
- Sensible risk only. A setup counts only if its stop is between a quarter and 6 times the average candle range (ATR 14) from entry (wider for session-range strategies), and its target is at least 0.75R away.
- How a setup ends. At its target or its stop. If one candle touches both, the stop counts. A setup also ends at any exit its page names, and after 120 candles (longer for trend and session strategies) if nothing is hit.
- Replays. A replay plays the latest setup this strategy finished on the live chart's recent history, sped up. It's the same setup the live chart confirmed, with the same entry, stop and result. If the strategy hasn't finished one recently, the replay uses example candles and says so.
- The trading day. A day runs 6:00 PM to 6:00 PM ET, like futures. VWAP restarts at 6:00 PM, and "yesterday" means the last full trading day.
How The 80% rule works
- 1Where's the level?
- Yesterday's value area.
- 2What's the trigger?
- After an open outside it, two 30-minute candles in a row (counted from 9:30 ET) close inside value, before 3:00 PM ET.
- 3Where is it wrong?
- Just outside value, beyond the edge price came back through.
- 4Where does it end?
- The far edge of the value area.
- Markets
- Index futures
- Timeframes
- 30m
- Sessions
- New York
- Also called
- value area 80% rule
What it means
A Market Profile rule: if price opens outside yesterday's value area and then spends two 30-minute periods back inside it, it often travels across the whole value area.
How it is confirmed without repainting
Both 30-minute periods must close.
When it fails
A close back outside value.
Education only. Prop Firm Duel does not provide trade signals or financial advice. This page explains how the strategy is commonly defined. Past results never guarantee future results.
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