It's important to remember this when you hit a losing run (or winning run). So that you don;t become too despondent (or euphoric). And this is especially true if you're betting the shorties and hit a bad streak. Which I have just been doing on the football. It's important to remember that a run of 5 or more losers is to be expected.
In any given 100 flips of a coin there is a 54% probability of there being 6 heads in a row, and in 1000 flips of a coin there's a 99.7% probability of there being 6 heads in a row. In any given 100 flips of a coin there is a 32% chance of there being 8 heads in a row.