Data as of October 31 shows Oanda continuing to close in on Gain Capital for top spot in the market-share derby. Interactive Brokers and TD Ameritrade are now roughly tied for a distant third place.
Interactive seems to be floundering, having lost nearly 30% of their retail forex customer base in the four months since June 2019, as Finance Magnates reported here –
Here is the CFTC data for October 31 (with comparison to September 30), as presented by
Finance Magnates —
click the image to enlarge it