These filters measure the distance between the 8 period and 20 period SMA’s.  This analysis is based on 2, 5, 15 and 60 minute time periods.  The number is always expressed as a percent.

A positive number means that the 8 period SMA is above the 20 period SMA.  A negative number means the 20 is above the 8.

The distance between the 8 period SMA and the 20 period SMA is used as a confirmation signal in many trading strategies.  This can show that a stock is gaining momentum.