How to improve redline from the BB?

Red line is going to be negative regardless from this position, but -47bb/100 can certainly be improved upon. That being said, 2k positional hands is not even remotely relevant in identifying if your true winrate for that position is indeed -47bb/100.

Go ahead and post your BB vs SB stats:

BB vs SB - call
BB vs SB - fold
BB vs SB - 3B

start there.

Your BB redline is supposed to suck. That's normal.

I simulated 1 million GTO hands (NL500 rake, 6-max cash). Then I uploaded those hands to PT4. Here's what BB's lines look like playing GTO: Blueline almost perfectly flat, Redline tanking off a cliff. Losing at -50 bb/100.

While OP's and "GTO's" winrates for BB are comparable (-47bb/100 and -50bb/100, respectively), it is important to understand that most winning players' winrates for the BB is quite a bit better than -50bb/100. So, I want to reiterate that if your true winrate is indeed -47bb/100 it CAN be improved upon.

Yeah, the aggregate of big winners in my database are closer to -30 than -50.

I found some screenshot of GTO winrates by position.

Compared to the aggregate of big winners in my database:
* LJ: 14bb/100
* HJ: 21bb/100
* CO: 26bb/100
* BTN: 37bb/100
* SB: -17bb/100
* BB: -32bb/100

These are positional winrates one should aspire to... They are going to be around the top end of what is achievable in fields that aren't super difficult.

Man I really gotta start watermarking my charts or something lol. This is from my video about rake.

https://youtu.be/DtIokiSGPdY?si=MHcxq__E...

Agree with what Brokenstars and Zamadhi said. You should aim for a winrate between GTO (-50 bb/100) and top regs (-30 bb/100). The GTO winrate here would be what the average player in the pool loses. So if you're striving to be better than average, then consider this as a lower bound.

It's quite easy to improve BB winrates far in excess of GTO because wide range scenarios are exactly where all regs have easily exploitable leaks. If I had to summarize it would be.
1. Raise a lot vs cbets (merged) and generally be extremely sticky on the flop (this is goes double for BB vs SB pots, look for any reason to NOT fold)
2. Fold a lot vs double barrels (virtually all regs are too equity driven when they bet turn)
3. Corollary of #2 is stab relentlessly after passivity (virtually all regs are too weak when they check turn)
4. Be an insane calling station in disconnected aggression lines (because their turn check range is too weak when they bet river they have too many bluffs)

Basically it comes down to treating their flop bets as nonsense and letting them turn their range face up on future streets.

Studying the proper BB defense ranges against all positions against all RFI sizings between 2-3 bb for your rake structure would almost certainly help. I constantly see people who play otherwise OK'ish being clearly clueless about for an example BB vs UTG 3 bb open defense range, which some players still commonly use.

I don't think you should be trying to improve through redline analysis in a vacuum. Betting and raising a lot as bluffs and thin value plus being sticky certainly helps, but there's a fine line between doing a lot of that and punting. That applies to all positions ofc. Still, I think a lot of people in micros that I've played have problems adjusting to the very wide ranges in BvB SRP's in particular, and therefore aren't very flexible with their value/bluff thresholds compared to how they play BB vs IP. If you do adjust accordingly, your overall BvB river aggression should perhaps increase, and in a population that mostly overfolds, your redline should improve. Just mind who you're playing against each hand and use common sense.

Also I haven't seen a lot of players who 3bet BB vs LP as much as they theoretically should. If you do so with a properly adjusted mergier range against players who 4bet too infrequently, which is almost everyone, then that will probably be good for your redline as well.

But yeah, I wouldn't be too worried about the redline itself, the yellow one is the only one that matters. GL

Live player
This fits, as a lot of my improvement is not that I’ve been winning more, but I have been losing less in many situations that used to cost me.

Nobody 3Bets the BB in my games. They do from the SB, but not the BB. I should probably try to exploit this. Being unexpected, players might overfold. Nobody wins from the BB overall, that’s the nature of bad position, and I don’t want to punt more, but I think I can target a few with this play. Trying to picture it through the streets and it might be hard to range villain. I guess I’m looking for an early fold. If villain gets sticky I won’t know where I’m at.

3Betting from the BB, would I be better with a polarized range or merged?