what is difference between sinput and input?

External question — Stack Overflow Stack Exchange Author: MohammadSaleh Original post: https://stackoverflow.com/questions/74782071 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. i wish you best. what is actually difference between static input and normal input in MQL language? i mean sinput and sinput in the book that i read written that: "The value of a static input variable can be changed, but it cannot be optimized in the Strategy Tester. Static input variables are useful for logical grouping of input parameters." what does it mean exactly "it cannot be optimazed"? could you tell me a example please? i can't undrestand the explanation and core difference.

External answer — Stack Overflow Stack Exchange Author: PaulB Original post: https://stackoverflow.com/a/74782299 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. sinput or static input simply excludes the variable from being able to have multiple different values tested when using the strategy tester. You can find a more detailed explanation in the documents: Input Variables