being 80% probable and losing 5 events in a row is 0.0003% likely or about 3000 to 1 ?

The probability is 0.00032 or 0.032% (which is roughly 1 in 3000)

do you know the exact equation ?
if it were 80% 80% 80% 80% and THEN 60% it would be what ?

I'm not sure I understand your question correctly. Are you asking how to multiply percentages?

If you want to know how likely it is for two independent events to both occur, you multiply their respective probabilities. So if something happens 90% of the time and you want to know how likely it is for it to happen twice in a row, you multiply 0.9 * 0.9 = 0.81 = 81%.

If you want to know how likely it is for something to not happen when the probability for it to happen is 80%, you subtract that number from 100%. So 1 - 0.8 = 0.2 = 20%.

If you want to know how likely it is for you losing with 80% equity four times in a row, followed by losing with 60% equity, you multiply 0.2 * 0.2 * 0.2 * 0.2 * 0.4

Ok thanks madlex and others

To be clear the probabilities given above are always the chance for the very next five events only. Over a longer span it increases as 1 - (1-P)^x
Where x is how many series of 5.