Yes Paul, I do agree with you that consistancy in setting of the oscillators is more important than the setting itself. Too frequent changes and be sure that you will have most of the loosers from various settings .....
I started trading more than a decade back with RSI ,MACD as my only tools ( and I thought I have discovered a holy grail...
) and I used to optimise the RSI settings every week to get the best possible setting. But to my utter surprise, one setting which was the best this week, some other setting vastly different will be the best next week....and something else totally different the week after that. I came to the point of optimising every day and then I realised that it is a wasteful excercise I am doing. Then I started running optimisation in the range of parameters every 3 months and as long as my parameters are in above 50 % of the optimisation results, I find it ok.
But markets change, volatility changes, so one can check whether the settings are catching the good number of trades or no harm in changing the settings but keep them constant for a reasonable period of 2-3 months or so.
Smart_trade