Is it possible to make that portfolio will show maximum load on capital during tested period (maximum open trades in the same time). It will help for money management so there will be no need to freeze surplus of capital and reduce the chances of margin calls.
bug was fixed, if you want a new feature please create a new task for it.
It is possible to show number of open positions in that day, but but I'm not sure it is really useful. Volume gives you info about the capital you need to allocate