Parabolic SAR is one of the best indicators, however like the ZigZag and heiken ashi , its usless in flat market ...you get lots of false signals

to void flat makret, you may want to consider using bollinger squeeze or waddah explosin or damiani voltmeter to stay away from flat market .. there are many other indicators also that can be used but those are the one I can remeber .

Good luck in your trading

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