need some help on how to find the std dev number for finding the sqn...
SO far i am working on the expectancy as suggested by AW10 in a post long time back...
The older formulas for expectancy have been phased out. The formulas given in the previous books of Tharp have been nullified by him in his last book. The latest formula divides the number obtained by previous formula by the average risk per trade, which is assumed to be equal to 1 R.
And if the risk per trade is unknown, the std deviation can be massive, driving down the SQN number into a much smaller range, making it unviable to apply position sizing techniques to such a system.
The same goes towards High R Multiple profits
And if the number of trades is kept to 50 for calculating SQN , its better. And the trades that you assume as your samples, should have a mix of all 6 types of markets. And if you dont have that in continuous form, like the mkts are trending for 2 months, then you need to take another 50 trades from a non volatile sideways range, and calculate the expectancy and std dvn and the SQN number for that kind of market