Back testing for betting model

[silly.patrick]

I have joined PL for years and wanna ask something about betting model... I have a database to record the trend of prices movement several bookmarkers for about 1 year. I am going to develop a betting model based on these data and run some back testing. Based on your experience, how long should I covered for the back testing (or back testing never works as only historical data were used)?

[uknowsit]

Re: Back testing for betting model Try backtesting every other months data and then applying it to the other un-tested months. Its hard to say if one years data is sufficient without knowing how much data you have within that range