The probability of each independent toss of a coin remains at 50%.

However, if you want to calculate the probability of a certain sequence of coin tosses, lets say HEADS - TAILS - TAILS, it can be calculated as you described by multiplying 50% * 50% * 50%, because the tosses are independent of each other.

If you want to calculate the probability of getting a certain number of HEADS in a sequence, take a look at the binomial distribution.

Some people say that probability is always the same, so if you flip a coin 10 times the chance is 50% always.

But there are some people that think different, they think that each new flip, the chance decrease, so

1- 50%

2- 50-50%= 25%

3- 25-50%= 12%

4- 12-50%= 6%

5- 6-50%= 3%

That topic is 100% related to trading, that i'm sure, so what do you guys think about that?

i tried to flip a coin 5 times, and never got the same sequence, tails or head, so i can assume 3% is a right number, 6 times giving the same side would be next to impossible.

If i assume its 50%, imagine 20 times, i get only tails, that would not be crazy? Believing that the probability remains the same is really hard to be plausible in reality.

So then i question, do you think probability is the same each try, or it decreases each new one?