The balance at start of April 18 was 26,902.00
If you look closer, the original deposit was 12,600, withdrawals are 15,000 (so, he is playing with banks money).
And further took the balance further to 32,000 and change.
I am not defending the system, but reporting the facts as I see them.
Yes, there are some heavy DD's, but with those kind of figures, and regular withdrawals, he is certainly way ahead.
For me it is definitely a martingale system especially after the 18. april. With a deposit of 12.000, there is a DD of more than 7000...... earlier or later the system will blow up your account..... definitely
All things come to those who wait.