If a user is getting an error “Insufficient balance” while trading check if the user has sufficient balance to buy or sell, this can also happen if user clicks on the buy or sell button multiple times thinking the order has not been executed. User needs to maintain a minimum order of 10 Euros, less than 10 Euro will encounter as “Insufficient balance” error. 

If the user has balance but still getting the error. Please contact our Live Chat Support or raise a ticket with screenshots.