Sweetheart, this is gambling. You win some, you lose some, by rights, and most of us end up breaking even. If you put 500 in to a session one day, but lose, then win 501 on another day, you’ve broken even. Gambling is a 2 way thing. The casino needs to make money (your losses) but needs to provide winnings (their losses). Yes, you can win, and win big, but, you can also lose, and lose a lot. There is no formula needed for this one, simply the luck of the draw, turn of the key. If however you are finding yourself chasing losses and throwing good money after bad, seek help, for you may have a gambling problem.