This indicator was described by Peter G. Martin and Byron B. McCann in their book "The Investor's Guide to Fidelity Funds" (1989).
EXPERIMENTAL: WARNING: Martingale is subject to HUGE drawdown spikes, use at your own risk! updated function to also double(aply multiplier) on even trades, example with a MA's crossover.
EXPERIMENTAL: WARNING:Martingale is susceptible to huge drawdown spikes, use at your own risk. simple functions for martingale wins and losses, multiplier can be adjusted manually to increase/decrease performance/drawdown.