Coding every PD array to determine its predictive value | Part 2: Fair Value Gaps. I coded fair value gaps on 5 years of Nasdaq data to see if they actually have any predictive value. 99% of them fill within minutes (which tells you nothing), tapping the gap barely beats random and doesn’t survive costs in any session, and the one entry that actually holds up isn’t what any guru teaches. In this series, we are going to code every one of ICT’s canonical PD arrays to determine its predictive value