Variable values can be put as parameters of the indicator by using the function input :

input is followed by the type of variable to configure (source, int, string, bool, color,…). The 1^st value in the parenthesis indicates the default value, while the text indicates the name of the parameter to modify. For a numerical value int or float, we can indicate the minimum value (minval), maximum (maxval) and the step (step).

The commands are then displayed, and the user can change these parameters:

In our code, these parameters are then used in the MA_function and in its graphic layout:

And There you go ! You have developed your indicator 🙂 In the next chapter, we will see how to code a strategy in Pine Script.