Understanding the Volume Above 1.5× 20-day Average scan

Volume is the market's polygraph: price says what happened, volume says how much conviction was behind it. This screener returns  stocks whose latest completed session traded at least 1.5 times their own 20-day average volume — a meaningful, above-normal participation day relative to each  stock's personal baseline.

Using relative rather than absolute volume is what makes the scan honest across a 500-stock universe: 10 lakh shares is a dead session for a large-cap and a stampede for a small-cap. A 1.5× reading marks sessions where someone with size showed up — institutional accumulation, distribution, news response or the opening shots of a breakout. The number itself is neutral; combining it with the day's price action gives it direction.

Volume analysis frameworks from Wyckoff onward rest on this exact observation: significant moves are born on expanding volume, and quiet drifts against heavy-volume levels rarely stick. Scanning the list daily builds a map of where the market's real money was active — often days before the price consequences become obvious.

How to use this scan

• Read each match with its candle: heavy volume on a strong close is accumulation-flavoured, on a weak close distribution-flavoured.
• Track repeat appearances — the same stock printing multiple 1.5× days in a fortnight is under active institutional interest.
• Use as a confirmation layer for breakout scans rather than a standalone signal.
• Investigate matches with no obvious news; unexplained volume often precedes announcements.
• Note volume spikes at range extremes — they frequently mark the level that decides the next move.