To import trade data from Rithmic login to R trader pro (Rithmic's native broker) and follow these steps:
In R Trader Pro, go to Recent Orders (or Order History for older trades).
Select an account.
Select a date.
Right-click anywhere in the column headings in the Completed Orders section, click Add/Remove columns and add the 'QTY filled' column.
Click on "Export as CSV".
Save the file in CSV format to your desktop.
In the Tradesyncer dashboard, click "Upload Data" and select the file you just downloaded.