Here are your ideal betting strategies:
Chance to win: 30%
Increase on loss:50%
Reset to base bet on win
No of bets:50
Alternate hi-lo per 3 bets.
Chance to win:40%
Increase on loss:75%
Reset to base bet on win
No of bets:64
Alternate hi-lo after 3 bets
Chance to win 48%
Increase on loss: 100%
Reset to base bet on win
No of bets:100
Alternate hi-lo after 3 bets
Chance to win: 69% (I like it)
Increase on loss:300%
Reset to base bet on win
No of bets:100
Alternate hi-lo after 2 bets
Chance to win:88%
Increase on loss:880%
Reset to base bet on win
No of bets:50 (So you won't bust)
Alternate hi-lo after 3 bets
Did you actually try out these strategies live or at least with a simulation? Seems like you are just making up configurations like the one with 69% win chance or the one with 88% win chance but with the huge increase on loss of 880%.
Seems the some do get lucky with some strategies but they don't want to post it in a public forum their secrets.