algo for crudeoil

i want to creat algo for mcx crude oil in pi platform as below

scrip crudeoil
lot size 1 nos
candle time 15 mints
buy condition vortex indicator (14) +vi crossover -vi from below after close of candle
sell condition vortex indicator (14) -vi crossover +vi from below after close of candle
order type BO
can anybody help to create the same
thanks in advance