I’ve been developing the frame work for high speed trading script in python which will (hopefully) be able to make small profits when conditions in the market are right. As the amount made on each successful trade is relatively small, commission is a large factor that dictates how successful my program ultimately is. I have been using Interactive Brokers API up till now but unfortunately their commission charges are making the viability of my strategy extremely limited. The only other API I’ve found that looked reasonably promising was through alpaca but for non US users a $30000 deposit is required which unfortunately makes this a less appealing option.
Are there any other trading APIs available in the UK allowing the purchasing of stocks that have no commission fees or fees smaller than those imposed by interactive brokers?
My program is written in python. Any help is greatly appreciated, cheers.