Expert opinion: Oscillators are intended to show turning points in price. They are effective for making decisions during lateral movements as confirming signals.
Expert opinion: The best oscillator signal is divergence. This is when the peaks on the price chart and the oscillator diverge. For example, during an upward tendency the upward peaks of the price chart correspond to falling peaks on the oscillator chart.
Expert opinion: Oscillator signals are not very effective during strong, extended trends. This is because they are primary intended to help you make decisions during times of uncertainty.