Pattern Detection
Range Expansion Day Detector
Enter today's range and yesterday's range to see the expansion ratio and whether today qualifies as a range expansion day at your chosen threshold multiple (default 1.5x yesterday's range). Free to use, no signup required.
Today's range must be at least this many times yesterday's range to count as expansion.
Expansion ratio (today / yesterday)
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Threshold used
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Result
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Educational tool only, not financial advice. Range expansion describes realized volatility, not a directional trading signal by itself.
Built by Jason Parker, founder of Trading Ranges.
Built by Jason Parker, founder of Trading Ranges.