It always confused me that your current station is not automatically the first line in the planning route as it is hard to know what commodity to buy from your current location. Your current station is not in the list because there is no profit trading at your current location, so I never add it, I have to remember what I should buy from where I am. Also it is not in the list, if you export/import the route, will that also not be included (not tried it)?You select the first station (which is most of the time your current one) and TCE showing you, what commodities have a high discount (avg. price - current price). Most of the time, you select the commodity with the highest discout.