Sorry to hear of your loss I am a fan of Martingale type systems but not on roulette , blackjack etc . I beleive that the longest run on Black recorded was in Monte Carlo and it was 26 . This allows all versions virtual included to run up to that sort of run without fear of complaint.
Study the sports such as soccer and look for sequences-They are out there.
Thanks lolly22 for post and others I am not niave to the fact that any run probably over 11/12 starts getting nervous but there is much that can be done to cover those eventualities. Further this is where the study comes in. Unsure of where I can post this information I can show a very interesting piece of work that goes back over 16 years that has returned very nicely but not Earth Shattering.