Day Change %
How far the price has moved from the previous session's close, in percent.
What it means
Change percent measures today's move against yesterday's official close. A stock at +5% has traded 5% above that reference — it is the single most used screening number in momentum trading.
The reference price matters more than it looks: after splits, dividends or data-feed quirks the "previous close" can be wrong, and every percentage built on it inherits the error.
Why traders care
- The universal filter for "what is moving today" — scanners rank by it.
- Momentum entries and mean-reversion entries both start from this number, in opposite directions.
In a TraderWe strategy
if ChangePct > 5 and DayAmount > 5000000:
Buy()A 5%+ mover with at least $5M traded today — percent alone is not enough.
Related terms
Educational content, not investment advice. Engine details describe how TraderWe computes this value; other platforms may define it differently.