Before the first call, most channels ask for two things: register through this link, and send us your UID. One of those decides who gets paid out of your trading, the other confirms you are on the list. Neither lets anyone touch your account, and both are worth understanding before you paste anything into a group chat.
If you are going to trade someone else's calls, the cheapest discipline available is to give them their own account. It makes the result countable, keeps an API key away from everything you own, and turns leaving into three steps instead of an archaeology project.
You clicked leave, so you think you are done. But the renewal still bills, the bot still holds a key, and the exchange still trusts a whitelist you set months ago. Quitting a channel is closing every door you opened when you joined — in the right order, before you lose access.
A channel posts a call, you take the trade, and months later you owe a number nobody kept for you. Here is what to save at the moment of each fill, and why the channel's win-rate screenshot is worthless as a record.
A signal channel can tell you which exchange to open, but it cannot set your security for you. These are the first few switches you flip that decide whether a leaked password or a compromised bot drains the account or just annoys you.
The gap between a channel's published results and what lands in your account comes from a short list of places. Each one is a column you can write down.
Most reviews of signal channels are useless to the next reader and easy to take down, for the same reason: they describe a feeling instead of a sequence of events with dates on it.
An API key is a spare set of permissions handed to software. Which permissions to grant, which to refuse outright, and how to check what you actually issued.