thebillionaire88 
Open trading account 
Yellen Speech is the key risk event this weak.I think trying to expect what she will say is a waste of time and effort. What really matters is USD reaction to her remarks. USD short trade is really crowded and bond long positions are very overstreched, That is why i say whatever she says USD is a buy (Unless she is drastically dovish which is not likely).
Good luck
Good luck