How to make a variable true or false in the "if" function in pine editor?

Question

A very big problem I encountered when trading strategy in tradingview that I could not combine the two strategies. For example, I need a variable to be true whenever the price goes up in the Bollinger Band so that I can use it in the future. If anyone knows the solution to this problem, I will be happy to use his experiences.

if crossover(x > y)
    test = true
if test
    strategy.entry("Short", strategy.short, oca_type=strategy.oca.cancel, comment="Short")

Answer 1

You have to create a mutable variable and initialize it in the global scope first: Note that crossover function accept arguments separated with comma.

var bool test = false
if crossover(x, y)
    test := true
if test
    ...

or

bool test = crossover(x, y) ? true : false
if test
    ...