What happens if Balance decreases and hits zero while Equity increases, free margin is still considerably greater than 0 ?

 
This is real situation that I encounter, equity > deposite, floating profit > 0, free margin is far greater than 0, but the Balance is going down and maybe will hit zero soon. Then, what will happen ?
 
Nothing.
 
angevoyageur:
Nothing.
And then B can be a negative value ?
 
sonthanhthuytu:
And then B can be a negative value ?
Yes,equity is positive and free margin is more than zero. Nothing will happen.
Reason: