Click on this LINK to set up Rithmic and VolFix. 

Select "Rithmic" from the left-hand menu.

For all NEW users:

When you first log into RTrader Pro, be sure to sign the two agreements.These are mandatory!! Don't forget to select NON-PROFESSIONAL.

Make sure you choose Apex for your System setting. NOT Rithmic Paper Trading! 

If you have trouble connecting Rithmic and VolFix, reach out to VolFix support.  Apex Trader Funding's support is LIMITED to NinjaTrader 8 exclusively.