For Easy Language users, here is the code for the Target Volatility sizing indicator
{Target Volatility Sizing Indicator EasyLanguage. Andrew Falde 2019}
Inputs:
TargetVolatility(.05),
HVlookback(21);
Vars:
Allocation(0);
Allocation = TargetVolatility / ((standarddev(c,HVlookback,0) / c) * Squareroot(252));
if Intervaltype = 2 then Plot1(Allocation);