Martingale and its origins of the word may prove me wrong...but in trading circles the consensus is that progression is what make a martingale..

There are some clever developers that evaluate strings of loss...vs. strings of wins that have devised a variable martingale series that is not in order...but with unequal sequential increments...

These martingales can be tailor made for the method..

...Now why do they call a Chart a Graph?...and a Target a Take Profit?....Leverage is called Gearing?...etc...(This is a UK thing) All of this is for another thread.

ES