Its kind of a worthless stat and you shouldn't worry too much about it.
It only accounts for the times when you're AI and have cards to come. It is a small piece if the luck puzzle. What it doesnt account for is the times a 40/5 hit his miracle 2 outer on the turn when you have a set and then the money goes in.
When you are running below EV it gives you something to blame for losing when it may just be that you are making some bad plays. When you are running above EV you might start to think that you're only winning because you're getting lucky. Best to not put too much stock in it.