Added input parameters:
Shift to shift the indicator line relative to the chart;
Draw Type to select the drawing style - line, line segments, arrows;
Arrow Code for the code of the arrow in the case of selecting the appropriate style.

Due to the limitation of input string parameters by 255 characters, it was not possible to enter a long formula into the indicator. Now added 6 additional input parameters, into which you can enter the parts of the formula.

Now, in functions that return price values and standard indicators, you can specify ranges of values as arguments. Such constructs can be used as function arguments with an unlimited number of arguments.
For example,
average (max (high (0:10)), min (low (0:10)))

Optimization of the indicator.