The copier tells you whether it would copy the next trade — before there is one — instead of leaving you to find out from a missing fill. Each blocker names what is wrong and what fixes it.
Not connected
The broker session is down on the leader or that follower.
Routing disabled
Order routing for that broker is switched off on the server. Nothing you can change from the page.
Not armed
The copier cannot tell a new hand trade on the leader from one that was already open, so hand trades are not copied. Alerts still fan out. The line says which of four reasons applies. The first comparison of the leader's positions has not finished — it clears itself within seconds. The broker has stopped saying what the account holds — reconnect it. This broker's hand trades are not being copied at all: the part that notices them is built and switched off, and the line stays until someone with access to the server turns it on — it names that switch where there is one to name. No broker offered today stands there, and the line exists because the next one to be added will. Or the leader is a spot account, which is where Alpaca stands: it owns what it buys, so what it holds also moves for a deposit or a transfer in, and Tradeus will not read those as trades to fan out. Nothing on the server changes that one, and the line names no switch for it — only leading the group from an account that can go short does. In all of those the panel's headline reads Not copying, although the orders from your alerts are still copied.
Group paused
The group's own switch is off.
Hand trades switched off
Copying trades placed by hand is switched off on the server as a whole. Alerts still fan out; only trades you place by hand are not copied.
Follower disabled
That one follower is switched off.
Blind
The last reading of what the leader holds did not produce an answer, so copying continues from the last picture that did — for about a minute, and then it stops. Two things cause it. The broker stopped answering, in which case reconnecting is the fix. Or the answer arrived and was refused because it could not be trusted — a hedged position, an instrument the account's own list does not name, fewer positions listed than the broker itself reports. When Tradeus refused the reading on purpose, the line ends with the reason after a dot, naming the instrument, the instrument id or the missing column — that is the one to act on. A line with no reason after it means either the connection is down or the two readings simply disagreed; wait a pass, and reconnect only if it keeps happening. Either way no follower is closed on a reading nobody could confirm.
Readiness refreshes about every 20 seconds rather than streaming. A change you just made can take a moment to show — that delay is in the display, not in the copying.