Some traders experience periodic forex trading platform "crashes", this typically happens during very volatile market conditions, usually around major economic releases. This is a very big problem because some of the best trade setups form in fast moving, volatile market conditions, you don't want to be stuck on the sidelines because your online broker doesn't have the redundancy they should have to be online every second the forex market is open. The best forex broker will have the technological capability to be online whenever you need them to be, not only during quiet market conditions, but during all market conditions.