Red to green

"Red to green" describes a stock's price crossing from below its previous close (or, depending on who's talking, below the day's opening price) up to above it, during the same trading session. Charts are typically colored so that a stock trading below that reference point shows red and one trading above it shows green — so when the price crosses that line moving up, traders say it went "red to green."

Most charting platforms and scanners use the prior day's closing price as the red/green line, since that is the standard reference for a stock's daily percentage change. Some traders instead watch the current day's opening price as their line. Either way, the mechanic is the same: price was under a reference level, then traded up through it, flipping the visual color and often the sentiment in the stock.

The nuance that trips people up is that a red-to-green move is a description of price action, not a strategy or a signal on its own. A stock can cross from red to green and immediately fail, especially in low-volume or choppy names. Traders who use it as part of a decision usually want confirmation — rising volume on the cross, the price holding above the line rather than just poking through it, or the move lining up with another level like VWAP (the volume-weighted average price, a running benchmark of the average price paid during the day) or a moving average.

Because it depends on which reference line a trader is using, "red to green" can mean slightly different things in different rooms — always worth clarifying whether someone means versus prior close or versus the day's open.