I personally am not a big fan of oscillators, though I do sometimes use them as a confirmation indicator (though rarely).

Oscillators in general I find are best for a secondary or tertiary indicator but I prefer price line and trend line support resistance indicators as a primary indicator and moving averages for a secondary indicator.

Most of them are just mathematical formula's to graphically show price movement with some incorporating other indicators (such as volume) into the calculations.

MACD is the one I most frequently use if I want to clean up my charts a bit.