I use a 20 period ema on a 5 min chart for the s&p e minis. My friend has the same set up with q charts. I was just on the phone to him when i realized we have 2 different readings,my price was below the ma his was above. I have gone over and over it has my friend to check we have done nothing wrong...i dont believe we have. I just called e signal who has slightly different results to me but only differs by 2 digits on the last decimal places(which i am not happy about) but not as bad as the big difference between q charts. We have exactly the same properties length:20 offset:0 source:close exponential. I trade from england if this is relevant which data is correct?