Why are the historical trading signals (the green and red fields) changing sometimes?
If you optimize the parameters of a model a specific day, parameters producing best results the last 1000 days are generated (if you haven’t changed any settings). It is also for these parameters Optimal Trader is showing historical trading signals by means of the coloured fields. These parameters are usually quite stable if you use long optimization periods. But if you optimize the same model a day later it may sometimes happen that Optimal Trader finds another parameter combination which has produced better results because the basis for the optimization has changed. Historical trading signals will also be changed as a result of changed parameters.
