What happens with the remaining batch when buying / selling partial quantities?
When you submit a purchase request, you can activate the trading option "Automatic Residual Purchase Request".
If you have adjusted this and a seller is selling you a subset of the crypto currency you have requested, the remaining balance will automatically be posted as a new purchase request to the same conditions.
This is exactly how it works when you place an offer to sell. Here you can also activate the trading option "Automatic Rest / New Sale Offer". If this option is selected, an offer to sell will be newly generated, even if a sale was terminated by our system (e. g. due to missing confirmation of payment) or cancelled by mutual agreement with your buyer.