Some EAs only run with a licence key typed into one of their inputs. Store the key once in the app under a nickname, and put {{nickname}} in the set file instead of the key. When a test runs, the app puts the real key in its place, so your set files never hold the key itself.

Plan: every plan.

Store the key

1. Click Settings at the foot of the left rail, then License Keys.
2. Click Add Key.
3. Type a Nickname you will recognise, for example the EA's name.
4. Paste the licence key from your EA vendor into Key.
5. Click Save.

The key is listed with its Template, for example {{Grid Basket}}. Click the template to copy it. The key itself is hidden; the eye button shows it.

Put the nickname in the set file

1. Click Library › Files.
2. On the EA's set file, click Edit Parameters (the sliders button).

1. Find the EA's licence input. Its name comes from the EA, for example Serial_Number or License_Key.
2. Type the template as its value, for example {{Grid Basket}}.
3. If the set file has no line for it, click Add Parameter, enter the input's exact name, pick String and type the template as the Initial Value.
4. Click Update Current Version.

You can also type the template into the input in MetaTrader, save the set file there and upload it to the app.

Good to know

• The key is filled in only in the copy of the set file that goes to MT5 for the test. The set file in your library keeps {{Grid Basket}}, so you can share it safely.
• Upper and lower case in the nickname do not matter. A nickname with no stored key is left as it is, and the EA will usually refuse to start: the queue then shows the test as failed, for example with Invalid License Key.
• Keys are kept on this PC only. On another PC, add them there too.

Related guides

• Manage your EAs and set files
• Run a backtest
• Manage the queue: pause, stop and requeue tests