It took me awhile to figure this out also.
It's actually OK for your red line to drop under your baseline. If you look at my graph you'll see that the further my blue line separates from my profit line, the further in the opposite direction the red line gets. It's basically because I are not pushing people out of pots without a SD. You are extracting more $$ from each street AND going to showdown. VALUE BETTING.
The very beginning of my graph was just donkey, tilt, etc. Then as I got that under control and started playing more optimally, I started learning how to value bet. My red $WWSD line got lower because I started learning to FOLD when I know that I'm beat (and maybe occasionally blowing a "thinking player" off of a hand that I don't want them to draw on). I'm really not trying to make something out of a hand that's got no chance. I admit I am not a really aggressive player, but it works for me.
While this graph is for 2NL, it is a perfect example as I see it because that is the best way to make $ down there.
VALUE BET
VALUE BET
VALUE BET
P.S. If you look at the very beginning of the graph, you'll see where I was firing on villains to get them to fold but getting looked up from time to time and paying the price.
As the GhostBusters said.......
and like taking a leak next to your buddy.....
"DON'T CROSS THE STREAMS"