The GSMG systems regularly and automatically execute robust optimisation routines to determine an optimal value for the minimum trade profit percentage. This is done for each market individually using its price data of up to 100 days back, where somewhat more weight is given to more recent data.
It is possible to "follow" this optimised value so that the trade engine always uses the most up-to-date GSMG optimised minimum trade profit in your behalf.
Note that if you think that the market behaviour of the last 100 days is not representing the current market very well, you are encouraged to set your own value for the minimum trade profit percentage.
Also note that for new markets, and in some rare cases for older markets, no such optimised value may be available (yet). The minimum trade profit percentage will then default to 1%.