Fred
Those stats are from the tote. You are laying to betfair and thus there will be discrepancy. As the odds go down the SR rises. I would not lay under $1.50 tote prices. On tote below $1.50 is 50% o/a rising to 82% at $1.20. I would not lay under $1.70 on betfair. I am looking at laying the top three with a backing bet on the fav to soften the sting but this will only work if the the top three are closely priced. Beton