You can use this indicator 2 different way.
1. Cross over and cross under with DIOSC and its MA.
2. Price and indicator divergences.
BUY Signal: If DIOSC is red (and relatively big at negative side) and cross over the MA line. Or DIOSC have a positive divergence with price lows.
SELL Signal: If DIOSC is green (and relatively big at positive side) and cross under the MA line. Or DIOSC have a negative divergence with price highs.