The top chart is the Stochastics and bottom chart represents . We can see a relationship between the two indicators, where the signal line bounces of the .
The strategy is simple, when the signal lines bounce of their together, review price action and then take the trade. If you see one indicator going in the opposite direction to the other, or opposite to price action, then you may be observing divergence in which case a big move is about to happen.
If you wish to have this indicator further customised, please do not hesitate to contact me.