What does this mean?

 
I'm new and have little cash to trade. The terminal keeps saying this " ForexBeater EURUSD,M15: We have no money. Free Margin = 100" THIS IS USING THE DEMO ACCOUNT. CAN YOU TRADE AS LOW AS $100 TO START OR IS THIS HAPPENING BECAUSE IT IS BELOW THE ODL SECURITIES TRADE AMOUNT REQUIRED? THANKS IN ADVANCE
 
See article Forex Trading ABC.