Bias Drill: Trading Practice
Candle bias drill: 1W, 1D, 4H
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Call how a hidden candle expands off its open and see the answer. Weekly, daily and 4-hour charts, simulated markets that never repeat, and real EUR/USD and WTI history.
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, iPad and iPhone Duo
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.
Made for iPhone Duo. On the outer display the drill fits one hand, with the market, new-set and tab controls along the side. Open it and the chart and your call sit side by side, either side of the fold. The Score tab shows the matrix beside your session log. A new shuffle button in the toolbar deals a fresh set in one tap.
The developer, Marian Camille Aviles, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Marian Camille Aviles
- Size
- 1 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Bias Drill Pro $4.99
- Copyright
- © 2026