Ask Colin

Point and Figure box size - Do you use a percentage from the stock price? What is a good method in determining the box size or is it trial and error.

I start with 2% of the current price and go up or down from there as necessary. A lot of it is art and also the time frame you are trading. I use more than one chart for any one stock - at least a long term chart with a large box size and a shorter term chart with a smaller box size.