I need to implement the Metatrader API to create a custom plugin. What I want to make is, right now I am using e-signal API for datafeed. Using which I can show the bid and ask price in excel, and Metatrade server will get that data from excel. I want one field which is Last Price for which we are not allowed to create in metatrader server. I want to create plugin using which we can get last price field in metatrader server using Metatrader Gateway API.