Sampey...thanks for your responses ! Things are definitely getting clearer for my brain 


I'd like to make some suggestions for the program then, mostly about getting feedback on how the algos and markets you have chosen are performing....

• I think most people would like to keep track of daily earnings over a 24hr period, so sum of all ping pong successes. This should be calculated between a user configurable set time each day. I think many users would do their daily housekeeping around the same time each day and then want the 'new' period to start after this. Historical daily earnings in a graph would be great. Graph needs to be interactive, so can hover to see actual values.
• It would be great to see which markets have given the best returns on each previous day, so users can make decisions as to if it is worth staying in that market or not. Maybe this is easiest shown on a stacked area chart with one colour to each market, as this also shows the total (above). The problem with this is what happens when users remove markets and add new ones to their trading ? What you could do is simply make the colour code for each market directly from the market ID via a formula. There is a chance you might end up with too similar colour next to each other, but on the plus side users would be able to post and compare charts, and each market colour would be consistent.

I think both of these are good suggestions, and it would be nice to see users posting their results, gloating over their massive profits  Might be good advertising for CAT too...if you want that....

These are definitely 'nice to have' suggestions with low priority

cheers