If the recent 3 days close for CL was 105 , 106 , 107 then the changes would be 0.95% and 0.94% over the last 2 days
however, if the 1st-2nd month spread closes for the last 3 days were -0.1 , 0 , 0.1 then the % changes for the last 2 days would calculate as 100% and #DIV/0! ( cant divide by...