Indicators always lag, forecasting doesn't change the fact that they are based on price performance.
Or in other words how can you tell this divergence is "the one" to pay attention to?
Ponder a little longer.I like TRO, he's a character. To answer his question, the indicator is a measure of the current price in the context of historical price. When you change the lookback period of historical price (i.e., change the time frame), the measure changes accordingly. Just that simple.