Forex Simulator JSTrader

JS Trading Lab

About this app

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Practice & Test with Historical Forex Charts
Backtesting & Demo Trading App
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Trade Simulator JSTrader is a Forex simulator app that lets you practice and backtest trading strategies using real historical market data with zero risk. Features include multi-currency pair synchronization, unlimited bar replay, and fast-forward/rewind functions for efficient skill development.

💡 Perfect for Forex Beginners
・Practice demo trading without risking real money
・Train anytime, even on weekends or outside trading hours
・Rewind and retry as many times as needed
・Analyze your performance objectively with automated statistics

📈 Serious Backtesting for Experienced Traders
・Verify strategy reproducibility and edge with long-term data
・Analyze correlations and market sentiment with multi-pair sync display
・Auto-calculate win rate, profit factor, expectancy, and other metrics
・Improve discretionary trading skills through repeated practice of key scenarios

✨ Key Features

⚡ Ultra-Lightweight Design
Smooth operation even with multiple charts and long-term data
*Performance varies based on device specs (memory/storage/CPU)

⏱️ Long-Term Backtesting (No Bar Limit)
Backtest through extended periods depending on available data. Verify strategy reliability over multiple years

🪟 Multi-Currency Pair Synchronization
Display multiple pairs at the same time point. Visualize currency strength, correlations, and overall market sentiment for realistic trading decisions

⏩ Fast-Forward / ⏪ Rewind / 🎯 Jump to Specific Time
Navigate quickly to target scenarios. Practice entry and exit decisions repeatedly to improve accuracy

🧪 Demo Trading (Simulated Orders)
Practice with market orders
*Limit and stop orders support planned for future updates

📊 Performance Analysis
Auto-calculate key metrics: win rate, profit factor (PF), expectancy, etc. Objectively evaluate your trading performance

📐 Standard Indicators & Drawing Tools
Major technical indicators (moving averages, Bollinger Bands, RSI, etc.) and drawing functions to support your analysis

🗂 Data Information

🌐 Server-Provided Data
Free access to 1-minute data from 2011 onwards

💾 Custom Data Support
Import your own data to replay even older periods or additional currency pairs not provided by the server

👤 Recommended For

✅ Forex beginners wanting risk-free practice
✅ Traders wanting to practice on weekends or after hours
✅ Those wanting to verify if their strategy actually works over the long term
✅ Traders who want to analyze multiple pairs simultaneously
✅ Those wanting to practice the same scenario repeatedly with rewind
✅ Overcoming overtrading tendencies
✅ Establishing stop-loss rules
✅ Improving entry and exit precision

⚙ Main Functions

・Multi-currency pair synchronization
・Multiple timeframe support
・Long-term replay (no bar limit)
・Fast-forward, rewind, jump to specific time
・Demo trading (market orders)
・Order history management
・Performance statistics (win rate, PF, expectancy, etc.)
・Layout saving
・Drawing tools (trend lines, horizontal lines, etc.)
・Major indicators

⚠ Important Notes

・This app does not provide investment advice. All trading decisions are your own responsibility
・Replayable period depends on available data and device performance
・Data retrieval time may vary depending on network conditions
・Past performance does not guarantee future results

What’s new

Minor bugs have been fixed.