Explaination:

1. This page provides list of low PCR sites on trading day
2. Graph of Stock with EMA of 5,10 and 50 opn left
3. Bottom graph is plot of 2 CE and 2 PE options with higest OI or max pains where volatility is high
4. PCR: inf means only PE no CE trading. While PCR: 0 indicates on CE and no PE trading