I guess I will explain it again. I believe that it is unethical for a broker to have negative interest rates that are twice as high as the positive ones. That indicates that they are not really the interest rates that would be theoretically "passed through" from the interbank market if MBT/EFX is an ECN. The broker would have to be acting as a middle man and not a true ECN in order to have interest rates other than the true difference between those of the two currencies that are being held. And mathematically the negative side would have to be the same as the positive side.
The fact that the negative side is twice as high as the positive side would seem to indicate that EFX/MBT is doing something other than acting as an ECN.
The fact that the negative side is twice as high as the positive side would seem to indicate that EFX/MBT is doing something other than acting as an ECN.