Does anyone have any recommendation for the best broker to use for systematically trading futures (stock, interest rate, fx), ETFs on Europe, North America, Tokyo, Hong Kong, Singapore exchanges?
1. Costs (minimum account, transaction costs, monthly fees)
2. API - preferably python
3. Ease of use and efficiency of service.
4. Has a paper trading account
5. Market data availability
This would be for an individual UK based investor trading on medium frequency: e.g. run models 3 times a day and keep a minute-by-minute track of risk.