I am looking for a any platform which can allow me to trade simultaneously multiple accounts and multiple instruments. For example, I want to place LONG 1xES in Account A and simultaneously LONG 2xMNQ in Account B.

As per my initial research, Sierra chart allows it (if I am not mistaken). I know Ninja 7 offers but same symbols. Cross instruments are very important here (e.g. 1xES to 2xMES or MNQ in other account).

wonkxags 

I am looking for a any platform which can allow me to trade simultaneously multiple accounts and multiple instruments. For example, I want to place LONG 1xES in Account A and simultaneously LONG 2xMNQ in Account B. As per my initial research, Sierra chart allows it (if I am not mistaken). I know Ninja 7 offers but same symbols. Cross instruments are very important here (e.g. 1xES to 2xMES or MNQ in other account).

MultiCharts does, as long as you have the data feeds and broker profiles defined properly.

TradeStation allows us to trade multiple accounts (main account and sub accounts), but they are the same broker (TradeStation Securities).

~vmodus