Use the “Insert/edit link” button to make a web reference clicky:https://www.prorealcode.com/prorealtime-indicators/williams-highs-lows/. You can either copy & paste it into your strategy (removing return and all graphical instructions), assigning each event a different value to a variable, or you may change the indicator to return a value according to what it detects, instead of displaying arrows and ellipses, something like this:

//computation of the radius to draw ellipses
ReturnValue = 0 (1= ellipse  2=arrowdown  3=arrowup)

radius=average[200](range)/4
 
//formula to compute short term swing points
if (high>alto[1]) and not (high<high[1] and low>low[1]) then
 alto=high
 basso=low
 markup=barindex
 markhigh=high
endif
if (low<basso[1]) and not (high<high[1] and low>low[1]) then
 alto=high
 basso=low
 markdown=barindex
 marklow=low
endif
 
if alto<alto[1] and trend=1 then
 trend=0
 ReturnValue = 2
 drawarrowdown(markup,markhigh)
 mediummarkup=shortmarkup
 shortmarkup=markup
 longmarkhigh=mediummarkhigh
 mediummarkhigh=shortmarkhigh
 shortmarkhigh=markhigh
 //intermediate high swing points
 if longmarkhigh<mediummarkhigh and mediummarkhigh>shortmarkhigh then
  ReturnValue = 1
  DRAWELLIPSE(mediummarkup-1, mediummarkhigh-radius, mediummarkup+1, mediummarkhigh+radius)
 endif
endif
 
if basso>basso[1] and trend=0 then
 trend=1
 ReturnValue = 3
 drawarrowup(markdown,marklow)
 mediummarkdown=shortmarkdown
 shortmarkdown=markdown
 longmarklow=mediummarklow
 mediummarklow=shortmarklow
 shortmarklow=marklow
 //intermediate low swing points
 if longmarklow>mediummarklow and mediummarklow<shortmarklow then
 ReturnValue = 1
  DRAWELLIPSE(mediummarkdown-1, mediummarklow-radius, mediummarkdown+1, mediummarklow+radius)
 endif
endif
 
 
//drawcandle(open,high,low,close)
return  ReturnValue

I am Roberto, not Nicolas.

Line 2 of the above example needs to add “//” (double slashes to comment text) after “=0” or it will trigger an error message.

If you want to use that indicator on the price chart, you don’t have to modify the original code, just use it as is.

The example above was made to be CALLed or embedded in a strategy or, but it’s pretty ugly, displayed under your chart.

To call it from inside your strategy:

indicator1 = CALL "My Indicator"
IF indicator1 = 1 THEN....        //Ellipse found
.
.

I can’t really detect why it behaves like that. I hope Nicolas can help us.