It is posted weekly on the " AIM Users Bulletin Board " You dont need to calculate it.
It is about 60% cash now. Some people reduce that for funds.
Another thought is to pick what you want to invest in and wait for the 13 day moving average to cross the 30 day ma to the upside. If something is going down the 13 day will be lower and as it starts to go up in price the 13 will cross the 30. You will avoid buying something that goes down just after you buy it.