Straddle & Strangle charts on Amibroker

Hi, I've got the below AFL to plot straddle or strangle charts on Amibroker. However, what's getting plot on chart is not the total premium of both the legs but just 2x of one of the legs. Please could anyone help me with this? Screenshot below. Strangle premium should be 174 but it's showing as 191 which is 2x of premium of 36400CE


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