R is a standard term in trading that stands for "Risk." It represents the amount of money allocated for a position if it hits the stop-loss.

For example, if your deposit is $100 and you set your R at 5% of the deposit, then your stop-loss will be $5.

If I write 0.5R, it means that my stop-loss is half the risk I’ve set, so an AVAX short at 0.5R would mean a stop-loss of $2.5.