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.