Live and Demo Trading ← Knowledge Base Do you charge any commissions? Do you offer institutional/corporate accounts? Why are S/L and T/P lines not always responding when I try to drag them on the chart of my mobile app? How to partially close a trade? How does slippage work? Why did my charts and quotes stop moving after Friday? Is there a possibility to trade automatically through an API at Trade Interceptor? If so, what kind of programming language do you support?