Generally, if we don't have inherent support for an exchange (like Robinhood), you could convert the CSV they provide you into a CSV that is compatible with our system. However, the Robinhood CSV does not have the required information to import the data. Namely, it's missing the volume. You need to export the PDF from Robinhood and then take the information from that file and manually enter in your trades, or transcribe the data to one of our standard CSVs that can be imported. This link has a sample Trading CSV that you can download, fill with your data, and import via the Standard CSV upload on the Trading Tab.
You can submit a support request and our team can help error check this converted file for you, but due to a high volume of requests paired with the nature of the Robinhood export (PDF), we are unable to convert these files for you.