DaveJB I have only been a member of this forum a few weeks but I see you are so busy promoting your own program which, incidentally  I downloaded and tried, that you can't see anything good about any other system. As Rognvald said biorhythms are a very small part of the Updata program. Its for traders.  Try reading about them before you dismiss them which I have done this week.  As you have now guessed, they are not market predictors but tell humans when their critical days are.  I am still learning about them, but if there are days when I would be more inclined to make a mistake, I would rather not trade.  Ask your pilot friend if his airline tracks his biorhythms.  He will say yes!  Perhaps you could scan PF charts of them.   😉