I'm not sure you'll find what you're looking for here. Many traders on ET are looking for a largely anonymous forum; the "truly successful" have little-to-no economic incentive to provide an Internet forum with definitive confirmation of their success, as this could open them up to fraud, amongst other things.
FYI, highly successful traders are periodically offered large sums (running into hundreds of millions) to run, once their brokers (but only certain brokers) see how well they're doing; if they accept, at that point many of them are no longer "DIY", by most peoples' definition.
Alternatively, James Harris Simons could be considered a "truly successful DIY day trader", if you consider how he started out. The fact that he now owns the world's most successful hedge fund is an outgrowth of his initial, DIY trading.
Also, not to say this is the case with you, but it often seems on these forums that those searching for a confirmation of their belief (e.g., "there are no successful DIY traders") move the goalposts to satisfy their presupposed conclusion; for example, another ET thread gave the "really successful" criterion as meaning something like trading $10,000 into $100,000,000 within 2 years. No one has done this, therefore it's impossible to be "really successful at trading", according to that person's definition.
To look at this from another angle, how much are you willing to pay to get whatever "confirmation" you need, and exactly what sort of "confirmation" would you need, and exactly what performance? Maybe someone will bite if you clarify this, and start another thread, making a very specific proposal that could be brokered by Baron.
Profitable private or retail traders are all dismissed by people at this forum for many "stupid" reasons that I've seen posted here over the years:
1) He's not a member of the forum
2) He's now a fund manager and if he was really that good...he'll still be trading his own private account making millions or billions instead of working for a fund (investors).
3) He didn't post live calls
4) He did not do such in today's markets (it was done in markets from years ago)
5) Its not his only source of income
6) He didn't share his method so that it can be tested and verified

7) He didn't turn less than 10k into 1 million in less than 2 years
8) He didn't have a win:loss greater than 90%
9) He didn't post his income tax statements to see if he had another source of income
10) He's now a vendor (can't be trusted)
11) He started a fund and the fund lost money even though he was a profitable private trader prior to starting a fund
12) He no longer post at this forum (his account is inactive)
13) He's from a wealthy family and didn't have the typical financial pressure that most retail traders have
14) He uses other things in his trading with his trade method (argument usually thrown at TA users)
15) He must have been successful trader for a minimum of 10 years
I can go on and on with the above but I think you understand why traders do not take the naysayers seriously mainly because each naysayer have their requirements or they change their requirements. #5 above is the most recent requirement.
Ironically, there are private traders at this forum that have either posted verification (brokerage statements) while posting live calls elsewhere and one of them has been audited.
The two traders (inactive members of ET) mention is Tony Oz and Timothy Sykes. Both profitable private traders PRIOR to becoming a vendor. Both have either posted their brokerage statements here at this forum or someone has done in for them here at this forum. Yet, both still trade their private accounts regardless if their website is successful or not.
Ironically, every naysayer that I've seen at this forum...they've at least mentioned once here at this forum that they themselves are profitable traders. Yet, they too refuse to post any brokerage statement or audited trading records.
Furthering the contradiction, they naysayers are primarily pssst at specific traders they've had consistent disagreements about anything related to trading or related to life itself. I only state this because the naysayers do not challenge others for proof of profitability if the person is a friend at this forum. Simply, the demand for proof is really a personal conflict that has developed between two traders.
So yeah, James Simons was a very successful private trader and the same is true for Paul Rotter. Unfortunately, depending which naysayer you're talking to at this forum...those guys will be dismissed for any of the above reasons mentioned. Those specially mentioned above will never bite on anyone's request because its already been posted here or elsewhere without any school yard challenges.
Like you said, this is an anonymous trading forum. Most folks that join this forum probably would not join if their identity was available to every other member.
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