
Bias Drill: Trading Practice
Candle bias drill: 1W, 1D, 4H
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Free
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About
Look at the chart. Call the hidden candle. See if you were right.
Bias Drill trains one skill: reading which way a candle will expand off its open. Each round hides one candle — weekly, daily or 4-hour. You call it Expand bullish, Flat or Expand bearish. Then it is revealed with its open, high, low and close, how far it ran on each side, and whether your call was right.
HOW A CANDLE IS GRADED
The close is ignored. The drill measures how far the candle ran above its open and how far below. If one side is at least twice the other, that is the direction. Otherwise the candle is flat. You can set that band to 1.5×, 2× or 2.5×.
THREE TIMEFRAMES
Drill weekly, daily or 4-hour candles. Switch at the top of the market menu; each timeframe keeps its own set.
MARKETS
• Five simulated markets, each shaped to the behaviour of a real one: Nasdaq-100 futures, S&P 500 futures, Bitcoin and an S&P 500 ETF. A sixth option deals a random character every set. Daily and 4-hour sets carry each market's own overnight gap, measured from real data. The bars are generated on your device, so they never repeat and can't be memorised. Each set holds 520 candles, and you can deal a new one whenever you like.
• Real history: EUR/USD weekly since 1999 and WTI crude oil weekly since 1986, built from public-domain Federal Reserve and EIA daily prices. These sources publish one price a day, so highs and lows come from daily closes and wicks run shorter than on an intraday chart.
• Your own data: import up to 8 CSV files, such as a TradingView chart export. The timeframe is read from the file, a candle still trading when you exported is left out, and thinly traded data is flagged.
BUILT FOR PRICE-ACTION TRADERS
If you study ICT or Smart Money Concepts, this drills the part those ideas turn on: which side of the open a candle expands into. Read the context — liquidity resting above and below, displacement, fair value gaps, order blocks, the weekly and daily profile — then call the candle and see it graded. Bias Drill is an independent practice tool and is not affiliated with, endorsed by or associated with any trading educator or course.
TRACK YOUR READING
• Accuracy, total calls and your streak
• A matrix of what you called against what actually happened
• Your most common miss, named plainly
• A log of recent calls
MAKE IT YOURS
• Show 26, 52 or 80 candles of context
• Show or hide dates
• Light, dark or system appearance
• iPhone and iPad
PRIVATE BY DESIGN
No account, no ads and no tracking. The app makes no network calls, and files you import stay on your device.
PRICING
Try it free for 30 calls. A single one-time purchase unlocks the drill for good. There is no subscription, and the unlock follows your Apple Account to your other devices. Your score and streak carry over.
The simulated markets are generated, not historical prices. Bias Drill is a practice tool and does not give investment advice.
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What's New in Bias Drill
1.0.1
September 22, 2026
Better App Store search terms, so traders looking for candle bias, price action and chart reading practice can find the app. The drill itself is unchanged.
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Subscriptions & In-App Purchases
$4.99
Bias Drill Pro
Every market, EUR/USD and WTI history, CSV imports









