assetList("AssetsDarwinex","EUR/USD","GBP/USD"/*,"AUD/USD"*/);

Let's count the parameters:
one: "AssetsDarwinex"
two: "EUR/USD"
three: "GBP/USD"/*
four: "AUD/USD"*/

The last two are garbage entries anyways. And you don't need the second one.

Let's change it to this:

assetList("AssetsDarwinex");

The assetList() call loads a csv file, named AssetsDarwinex.csv in your History folder. Make sure this CSV has only the three assets you need, and you're all set.

Therefore, your for(listed_assets) call will only load the three assets in your CSV file.

Try it.