These alerts report when one intraday SMA crosses another.  The server is constantly monitoring for an 8 period SMA crossing a 20 period SMA, or a 20 period SMA crossing a 200 period SMA.

When a shorter term SMA crossed above a longer term SMA, most people call that a bullish signal.  We report that case in green.  When the cross happens in the other direction, we report that in red.

The server watches for these alerts in the 2, 5, and 15 minute time frames.  Notice the large red or green number in each icon.  This is the number of minutes in the time frame.

The short term SMAs (8 vs. 20) are usually used to describe shorter trends.  The longer term SMAs (20 vs. 200) are usually used to describe longer trends.

Like all analytics based on intra-day candles, the exact values of these formulas can vary from one person to the next.  However, SMAs are naturally very stable.  If the alert server reports a crossing, it is safe to say that the two SMAs are touching or at least very close.  This alert condition will be easier to see on a chart if the stock is moving quickly; the SMAs for slower moving stocks often seem to overlap for a long time on a chart.

The server always reports crossings at the end of one candle and the start of the next.