Need a robot to auto trade in 3 symbols based on parameters

Hi,

I need a robot, which wil get instructions to trade in 3 symbols at the same time based on few parameters and calculations.

Example:

There is 1 symbol called Gold-Near and the rate for it is 1000-1002

If i specify that when the rate reaches 1050, it should sell 1 lot

Upon execution it will have to sell 1 lot of cme gold, buy 3 lots of mcx gold and buy currently (lots will be based on calculation).

All the calculation and logic will be explained, just needs to be coded and executed. Also the bot should consider the available margin, required margin, the maximum allowed quantity, symbol trading limit and symbol trading step. This data can be fetched from symbol settings.

When placing the order, the there symbols have to be selected, Quantity will be auto placed based on calculation.