Check channel state first
Confirm the channel is connected, enabled, not paused, and allowed to execute under the current settings.
Check parser and symbol reasons
Unclear formats, unsupported symbols, missing stop loss, or blocked symbols can stop a signal before it reaches MT4 or MT5.
Check account and approval state
A disconnected MT account, manual approval mode, or account-level problem can make it look like copying failed when the signal is waiting or blocked.