If you would have done this in the week-end just passed, you would have bought at around 10240$ and sold at 9790$. Not a good business.
The morale of the story is: don't just go by various self-called specialists, some don't know sh*t and Bitcoin market is more volatile than the "rules" they want so badly to find out.
There was another expert a week ago telling us that is best to buy on Monday and sell on...I don't remember but I hope it wasn't Friday.
The biggest problem with those statistics is that even if they were 100% true the moment people would start following them and something like 10% of the buyers would really buy on Friday the prices will skyrocket during that period and dump even more on Monday so for some it would be a total loss.
Those things are like trying to guess the winning horse based on the winners's number from previous races.
You might hit the jackpot once but you're going to lose 3 times that when you draw the line.