What can I learn from this PokerEV graph?

[MattS]

Today I tried out PokerEV written by Phil153. Unfortunately it doesn't support Prima, Crypto, Tribeca and Paradise Poker. Therefore only 1/2 of my PTO8 database could be plotted. Nevertheless here is my graph:


I am surprised how much money I have lost with hands that did not get to a showdown. Is there a way to get the green line closer to the red one without losing to much of my showdown win rate? And did any of you have the green line above the red one? I have seen Hold'em graphs with this feature but I am curious if this is possible in PLO8 too.