I’m not sure about the c next to the currency pairs. The markets stop moving at 5pm New York time. Sometimes it will stop a little before or after, but only because people are finished trading a little early, or there are some stragglers after 5 messing with their trades which may move the price a pip or two. It may be that the broker you’re using will stop the flow of data from their servers to yours so that when time runs our on your platform regardless of what is happening, everything stops.