In the forex market why are there giant spikes in price sometimes even when theres no news at all? -

I have noticed that happening during the quiet periods, when the major markets are closed. It mostly happens when a major institution makes a quick trade. Since the forex market is so vast, it s nearly impossible to predict these things. It could be a mid-sized Japanese bank, or even the Fed. Just stay out of the market while its happening (unless of course you re making tons of money on an open position).