Calculating Mid Price

By now, most of you would have figured out that you want to open positions at mid price to remove house edge. However, how do you guys go about calculating it? When trading I've always added the bid and ask and divided by 2, as I'm no math guru ... How wrong have I been! I felt below was worth sharing:



http://ift.tt/1wOxFAo



This would apply to those who trade stocks/derivatives with wider spreads.