What do you mean chart pi. What method are you using to chart it? Pi is a single number. In order to convert it to a time series you have to have some way of going from a single number to multiple numbers.
I ran it as a sequence: 3.141592653 => array(3,1,4,1,5,9,2,6,5,3); Then normalised the results with -4.5, so that there was an even distribution of +ve and -ve numbers. Edit: Finally, converted normalised values into a OHLC bar format.
Using how many numbers to use for a bar? So for example, how does this get turned into a bar: (3, 1, 4, 1, 5, 9) Although, if pi is essentially random, shouldn't matter and the statistics are probably extremely similar.
I think if I told you the timeframes of either chart, the answer would be more obvious. I'll wait for a few more votes. I was fuzz testing my neural network, and found the PI charts remarkably similar to an actual marketplace. They're good for the testing procedure anyhow.
It's most likely only similar because numbers go up and down. You could probably do the same thing with any irrational number.