Just wondering if anyone knows how PT4 creates the "Luck Bell Curve" in leaktracker? is it for flopped straights/flushes/sets or for overall made?

For the last 140,000 hands my luck bell curve shows straights being right at the very end of the unlucky section (literally bottom 0.5% of the curve) with my flushes section sitting in the 'unlucky' zone and my sets section sitting just above the midline in the normal zone.

In the last 10k hands it feels like I'm making a lot more of my straight/flush draws and I'm wondering if this is now just variance starting to even out that curve. How many hands would it take to even out variance like that if my straights made % is really that much lower than average? Is there a way to exploit it in the future when it feels like variance is starting to even out?