Indeed the simple theory around Pivot Point is if price is above daily pivot point, this is bullish and vice versa. For traders, Pivot Points and their extention S1/S2/S3 R1/R1/R3 give support and resistance level, which in conjunction with more classical resistance/support drawing (previous high/low, bollinger bands, etc), can confirm some strong inflexion price, certainly when the market is not in “one direction” mode.

So if I understand well your work, pivot point and RSI both stand out as quality filter so far?