HOW CAN I WRITE CODE FOR ADX crossover for buy/sell and exit

Algos, strategies, code
1

Provide me code for crossover of ADX.Crossover of +DI and -DI, when ADX is above 15 and moving upside

  1. buy if DI+ cross above DI-
    exit buy if DI+ crosses ADX from upside or dip crosses below level 40

  2. sell if DI- cross above DI+
    and
    exit sell when DI- cross ADX from upside or din crosses below level 40

2

For the above given condition

Buy Script:

CROSSOVER(DIP(14),DIN(14))

Sell Script:

CROSSOVER(DIN(14),DIP(14))

3

and for cross over of adx and dip /din to exit the postition

4

sir please help me fr above condition
as this is not giving about exiting position at properlevels

5

giving wrong signal
why always giving wrong signal, without any crossover