What is One Candle Ahead?

One Candle Ahead is a free trading simulator that lets you practice stock and cryptocurrency trading using real historical market data, one candle at a time. You predict the next move, learn candlestick patterns, and build technical analysis skills without risking real money.

Is One Candle Ahead really free?

Yes. Core gameplay — stock and crypto simulations, leaderboard, candlestick charts — is 100% free. The iOS and Android apps include optional in-app purchases for cosmetic items, but nothing is paywalled.

How do you learn candlestick patterns here?

Every game reveals one candle at a time from a real historical chart. You decide whether to buy, hold, or sell. Over dozens of rounds you internalize the shape of reversals (hammer, engulfing), continuations (marubozu), and indecision (doji) in context — not just from a static chart picture.

What market data does the simulator use?

Real historical OHLCV (open/high/low/close/volume) data for major U.S. stocks (AAPL, MSFT, GOOGL, TSLA, etc.) and top cryptocurrencies (BTC, ETH, SOL). Chart windows are randomized so you can't simply memorize outcomes.

Does One Candle Ahead work on mobile?

Yes. The web app is fully responsive, and native apps are available for iOS (App Store) and Android (Google Play). The mobile apps add 14 achievements, daily challenges, PvP duels, referral rewards, and a seasonal leaderboard.

Will this make me profitable in real trading?

No simulator can guarantee real-market profits. One Candle Ahead trains pattern recognition and disciplined decision-making — two foundations of good trading — but real money involves slippage, fees, news, and emotion. Use it as practice, not a crystal ball.

Do I need an account to play?

No. You can start as a guest. Signing in with Google or Apple saves your balance, leaderboard rank, and achievements across devices.

About One Candle Ahead

Studio Solum, the indie studio behind One Candle Ahead, how the simulator is built, and the data sources used.

Last updated: 2026-05-07

Who we are

One Candle Ahead is built and maintained by Studio Solum, a one-person indie studio based in South Korea. Every article, simulator mechanic, and product decision goes through the founder. There is no anonymous content team — the publisher is identifiable, contactable, and accountable.

Why we built this

Most trading education shows finished charts and tells you what should have been obvious. We wanted the opposite: reveal price one candle at a time, force a decision before the next candle, then review what actually happened. That is the entire product. The blog exists to explain the concepts the simulator drills.

How we make content

Articles are drafted by the founder using AI tools for outlining and language polish, then every fact, figure, pattern definition, and example is checked manually against historical OHLCV data before publishing. See the Editorial Policy for the full workflow.

Data sources

Stock candles use publicly available end-of-day OHLCV data for major U.S. listings (Yahoo Finance / Polygon-style feeds). Crypto candles use the Binance public REST API. Date ranges, symbols, and refresh cadence are listed on the Methodology page.

Products

Free web simulator at onecandleahead.app, native iOS app (App Store), and Android app (Google Play). All three share leaderboards, achievements, and the same lesson-aligned content.

Contact

Reach the founder directly at support@onecandleahead.app. Typical response time is under 48 hours. Security reports: security@onecandleahead.app.

Last updated

2026-05-07