Longer term I believe it pays to note what volumes are doing with price moves...are days with higher volume more prone to be + for the PPS or -?
You can chart it using OBV, short for On Balance Volume.
The idea is that a move on bigger volume is more significant than a move with comparatively smaller volume. For example, if the PPS jumps from $1.75 to $1.80 on volume of 4 million and then goes down from $1.80 to $1.70 but on volume of just 2 million....the move up is said to have double the weight of the move down.
Of course a lot of retail investors focus more on the PPS than on the volumes being traded.