what is optimal lookback period and standard deviation standard deviation and optimal lookback period in hidden markov model optimal lookback period and standard deviation optimal lookback period standard deviation optimal lookback period for hidden markov model with standard deviation what is optimal lookback period optimal lookback period in hidden model how can i identify optimal lookback period optimal lookback period definition why is lookback period necessary optimal lookback period vs standard deviation optimal lookback period optimal lookback period and standard deviation how to determine in which state in hidden markov model what is standard deviation of hidden markov which is optimal lookback period optimal lookback period and standard deviation level analysis optimal lookback period what is standard deviation of hidden markov model optimal lookback period