You can have more accounts, but the maximum value of initial balance for program ProTrader is 500 000 € (or equivalent in different currency) and for program SwiftTrader is 200 000 € (or equivalent in different currency). The only exception is account with applied scaling.
We advise to use different trading strategies for different accounts. In that way you reduce the risk of closing multiple accounts at once.
For open positions, you can have a maximum of 500 open or pending orders at once.
There are limits for max. order size:
FX - 100 lots
Gold, Silver, Oil - 100 lots
XPD, XPT, NGAS - 20 lots
CFD Indices - 20 lots