Michael's EMA - Original with 200 EMA Filter

This indicator plots a 12-period EMA and a 21-period EMA on the chart, coloring them green when the short EMA is above the long EMA (uptrend) and red when below (downtrend). A signal is generated whenever the 12 EMA crosses the 21 EMA (either upward or downward), indicating a potential trend change. The signal is displayed as a yellow vertical line with a "CROSS" label above the candle. A 200-period EMA is plotted for reference but does not affect the signal. A single "Crossing" alert condition is provided to notify when the 12 EMA crosses the 21 EMA.