FastWays incorporates  both two dimensional and three dimensional analysis, each with certain advantages.  The biggest advantage of 2-D analysis is that it shows the range of returns for each set of parameters.

The reduced size makes it difficult to read the screens on some monitors, but we wanted to talk about them while you viewed them. To see a larger view without text, click here. 

 The green points indicate the highest annualized returns for any given parameter while the red ones represents the lowest returns for that parameter. Let's more closely examine the graph over the long parameters. The best results occur at 60 but the results for 70 are fairly close. More importantly, the worst results at 70 were better than the worst results at 60. That is, the short/long combination showed less fluctuation at 70 than at 60. Whether or not this impacts your decision is a personal preference, but at least you have that  information, thanks to FastWays. Of course, we would do a refined analysis (closer intervals) before making any final decisions.