It is common cause that those traders are paid to do exactly that which their same Masters who now blame them (and want to pass the buck so to speak) won't blink an eye to get at the retail traders in an underhanded way, the way the Competition tribunal now claim to have exposed.
We must understand that the Forex market is the largest single (most traded) market;bigger than all stock markets pooled together and trading 1,5 trillion dollars in retail trades alone, is the cherry on top for these bank traders to move the markets as & when they please to reach those targets set by their Fatcat Masters and earn their lucrative bonuses.
Who gets hurt in the process is none of their concerns...if it's our tiny economy with it's third world poverty problems; it's not their business...their business is to exploit the loopholes allowed by our gullible government to make profit as counter desk dealers (collusion or not) and manipulate the value of our currency to please the strategies,power play and targets of the banks that they work for.
This is criminal and in some countries the bosses of those banks would be jailed other than here where a big fat fine would be laughed off as a slap on the wrist.
Fred