What does "tick" mean in charts?

I am currently trying to write a strategy in TradingView and I want to add a trailing stop to my bot.

I found the right variable to use, but it keeps referencing ticks. What are “ticks”? Like pip/pipette movements, or are these every time the chart refreshes?

Thanks in advance,

“pip” is the value that change/or not, every chart “tick”.
In other words, the tick is a trigger that activated at any received value of the chart (yes, you can call it, chart refresh)

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