I am looking for a broker which has somewhat advanced platform. I want to be able to do 2 things at least 1. to chart pnl and greeks for hypothetical trades in past based on real historical data (backtesting) 2. to chart pnl and greeks for my open trades Ideally I want to have access to the historical and real-time market data and open positions information through Excel. I found TOS has nice feature called thinkBack which does partially what I need. But their new bosses in ameritrade doesnt let them open UK accounts.... Anyone knows whats the actual problem and is it going to be resolved any time soon ?