I think this is partially based on your stakes.
At 5NL it is not going to be profitable to
bluff every station at the table. Hence its gunna be hard to build up your non-showdown winnings.
I've played the micros for a long time now. I'm a solid winner and my redline has never been positive.
Maybe when I get to 1000NL I'll be making more of my money from bluffs. I'll be making less of it from utter fishcakes calling 3streets off with 2nd pair.
I will have a smaller winrate and more variance and more than likely a positive red line.
I'm gunna enjoy having a negative redline whilst it lasts