如何使用波動率計算器

1. Select your currency pair from the 9 major pairs available
2. Choose a timeframe (1H, 4H, Daily, Weekly, Monthly)
3. Click Calculate to generate volatility analysis instantly

What You’ll Get

• Daily Volatility — Average daily price range in pips (based on 20-day historical data)
• Weekly Volatility — Estimated weekly range using √5 scaling
• Monthly Volatility — Estimated monthly range using √22 scaling
• ATR (14) — Average True Range, the industry-standard volatility measure
• Volatility % — Annualized volatility as a percentage
• Stop-Loss Recommendations — ATR-based stop-loss levels for different risk appetites

理解ATR（平均真實範圍）

ATR measures market volatility by decomposing the entire range of an asset price for a given period. It is calculated as:

1. True Range = max of (High − Low), |High − Previous Close|, |Low − Previous Close|
2. ATR = 14-period exponential moving average of True Range

Higher ATR = more volatile market = wider stop-loss needed.

為什麼波動率對交易者很重要

• Risk Management — Set stop-losses based on actual market movement, not guesswork
• Position Sizing — Adjust lot size according to volatility to maintain consistent risk
• Session Selection — Trade during higher or lower volatility depending on your strategy
• Pair Selection — Compare volatility across pairs to find the best fit for your style

Volatility Scaling Rules

Volatility scales with the square root of time:

• Weekly ≈ Daily × √5
• Monthly ≈ Daily × √22

This is a standard approximation used by professional traders and risk managers.

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