How much is to much?

This is more a situation analysis. I think Bill H. playes some 7stud H/L but I don't know if many others here do . I love the game, was playing alot of it a few mnts back. I can usualy double what I sit down with in an hour or so . My question is % wise how much is to much, stats wise calling/foalding and so on .

Tonight I played for about 50min, sat down with $20 and got up with $84 (took around $15 off 1 fish alone but the rest of the table played alright) any way about half way thru this, I get to thinking I have been calling alot of hands, but I ahve also had some real good starting ahnds for H/L . So I check the stats, I had seen 74% of the fourth streets, and am thinking this is alot . I took this screen shot right befor I got up >>>>>>>>>>


And then I go back after I eat and play for about 40 and look again and I am at %61 , ,. Sat down with $20 got up to $55 and left with $41 . ( this table is fuller and alot more agressive also) So can any one tell me about what a good % would be @ 7H/L? $1/$2 limit.