The experience is very important in the art of the betting in sport. To choose the events for betting right is often the main part of the winning. But this is the most difficult too.
The beginning of overview about Martingale betting system is here – Martingale Betting System #1 and Martingale Betting Strategy #2
How often and how good are you in guessing the credibility and the chances of the events?
Only getting the experience you’ll grow as a gambler. To find the best and the most profitable coefficient you should carefully learn all the lines of the offices (of course in those, where you have the ability to bet).
Besides you have to delete those events, the coefficients on which are higher than they should be, and such happens very often: as a rule not more than in 2-5 events through the week. For example, if you have chosen those events with the coefficient 2.0, you should be sure, that its chances are not less than 50%, because the size of the stake depends much on this credibility (which in every case is only your own point of view).
The duration of the game
For how long are you going to play with this strategy? If you set the purpose, finish the game, at that moment when you get to it, take your lottery away, and only then you can begin new game with that or maybe new sum of the money. In this case you’ll be able to feel, that you’ve earned some money, because in fact the money which are at the book-maker’s are not in your wallet!
A lot of the players use the Kelly’s formula, but some think that it’s too difficult and the risk is too big, because it needs the exact mark of the chances of the event. If you’ll value them too much, you’re at the edge of losing the money, because the size of the stake, counted with the formula, will be too big.
But you can use the decreasing coefficient, for example to divide the gotten result in two, and that will decrease the risk. Another way is to use the Kelly’s method for determining the proportions of the stakes, it means that you’ve got the problem: how much to bet on the game 1 comparing with the game 2?
You can do it the next way: let’s pretend with the help of the formula you’ve known that you have to bet on one game 4% from your bank. And on the second game it is 2%. If you’re going to bet on both these games 100$, you need to bet 4/6=37$ on the first and 2/6=33$ on the second.