Stochastic Momentum adds shorter and longer term Stochastic movements on the same chart to indicate relative momentum for short and slightly longer term outlooks.
Can be used like a regular Stochastic indicator for overbought / oversold levels, divergence and additionally also the crossing of the shorter (blue) and longer (orange) levels.
It is a leading indicator and often signals early moves of momentum, which may or may not translate into the same price movements.