Just some food for thots...
A. THREE look back options: metrics (such as Profit Factor) calculated based on 1) all trades and/or 2) number of trades to look back and/or 3) date
1) Sometimes I want to know which EA has the best overall performance (all past trades, instead of number of trades to look back) because if based on number of trades, then those scalper EA will have more trades as compared to day trading EA, etc and I want to find out the overall performance and select the EA based on all historical performances.
2) Based on the number of trades will help me zoom in on the most recent performance (but very subjective to how frequent the EA trades)
3) Use date to calculate all EA's performance. This is very useful when we constantly add in new EA into the portfolio and if I use the overall performance to calculate the metrics, the older EA may have better/worst performance due to more trading opportunities. So for a fair comparison, I sometimes use date to measure the changes in EA's weekly performance.
B. Copy trade size based on 1) specify lot size (can be different from Master account), 2) based on Multiple of Master (eg if Master uses 1 lot size and If I specify 0.1 it will use 0.1 of the original/master lot size and I use Multiple 1, it means I will use the same lot size of the Master. Basically users have the choice to choose lot sizes different from the master account so that it is easier over time for Account/Risk Management.
C. Account Protection: Stop copy when account's equity is below certain level (amount).
D. Copy Trade based on Max lot size allocation. Beside number of top Strategies to Copy, it would be good to have options to choose the number of trades/EA to copy based on the Risk exposure, ie. Total lot size allowed to copy. If I want to open a max of 3 lot size. Then as long as there are open positions that reached the max lot size limit, the copier will not allow future trades till existing trades are closed. This offer greater flexibility to manage the portfolio. For example, if I decided to increase my risk ratio, trade 10% of my account (i.e. max 2 lot size) and I use only 0.01 lot size per trade, then the copier can allow more EA/strategies to be traded. If I decided to increase my lot size to 0.1 lot size, then the copier will reduce the number of EA/Strategies to be traded.
Above suggestions are just for your kind consideration for future improvements etc, no obligations.