30m, or 30 Minutes, signifies data gathered over a 30-minute period represented as a single data point.

In the realm of crypto trading, particularly in charting, the 30-minute time frame is frequently utilized by traders to analyze the price fluctuations of a digital asset, displayed in 30-minute intervals over a designated time frame.

Each bar, candle, or column on the chart corresponds to the price action for a specific 30-minute segment.

For instance, if we examine a single day on a chart, which consists of 24 hours, we would observe 48 bars or candles represented on that chart—2 for each hour multiplied by 24 hours equals 48 bars or candles.

The 30-minute time frame can be integrated into a more intricate multi-time frame strategy, such as combining the 5-minute, 30-minute, and 4-hour time frames. This approach involves identifying trends using the 4-hour frame and then determining trade entries and exits with the lower time frames.