How to use if condition in trade script?

Algos, strategies, code
1

how to use if condition or function in trade script for divergnece value as the divergence being shown in google charts…that means if div.ie…>0.22 value it should give alert?

2

The conditional “IF” function allows you to design complex Boolean logic filters. If you paste the following script into the Script area in your trading software
application, you will see a column of numbers that oscillate between 1 and -1,
depending on when the closing price is greater than the opening price:
 

SET A = IF(CLOSE > OPEN, 1, -1)

In the above requirement IF condition is not required, you can directly give the condition  of  div or  MACD > OR <  values