To Maulfrug47,
Requote can happen at any broker, whether DD/NDD, STP or ECN. Requote is a situation where when executing an order at a certain price, the broker responds to our transaction request with a different price quote.
The requote situation often occurs in the forex market when there is rapid price movement or high volatility, usually caused by news or fundamental factors with a strong impact/effect so that the availability of liquidity becomes limited. Actually, requote cannot be avoided when the server is full.
And for Fxpro, the system uses NDD.
Thanks.