May 9, 2022 at 6:49 am #68141
I want to use the breadth engine to determine the percentage of S&P 500 stocks below their March 8th close. I will spare you the details of my attempts. Sorry I cannot figure this seemingly simple script out.
Attached is the chart I would like to duplicate. Please advise.
May 9, 2022 at 7:46 am #68146
- This topic was modified 2 weeks ago by Louis Spector.
I would use the STRDATE() function to mark the specific date I was after, then use VALUEWHEN() to find the Closing price for that date which can be used to compare the current close with.
The final script would look like this:123456V1 = STRDATE(DATE=2022-03-08) ;V2 = BARDATE() ;V3 = VALUEWHEN(V1 == V2) ;CLOSE() < V3
When setup in the Breadth module, the value from Tuesday May 3rd matches your chart example of 44.84.May 9, 2022 at 8:26 am #68151
Thank you Matthew! Perfect! I am trying to figure out why your script works and how to apply that understanding to future scripting.123456V1 = STRDATE(DATE=2022-03-08) ;V2 = BARDATE() ;V3 = VALUEWHEN(V1 == V2) ;CLOSE() < V3
VALUEWHEN returns a value when a criteria is met. Okay. Why does the BARDATE function not have V1 imbedded? What is V3 in words? Find the value when 03/08/2022 is equal to what? I am missing something. Thank you.
May 9, 2022 at 8:39 am #68154
- This reply was modified 2 weeks ago by Louis Spector.
BARDATE() returns an index value. So March 8 for example returns a value of 44,628. Rather than having to know and find that index value, STRDATE() converts that into a standard format of yyyy-mm-dd.
So V1 you select the date you are after.
V2 sets a BARINDEX value for all bars.
V3 says, when the BARINDEX value matches the selected date (March 8) show us the Closing value for that bar.May 9, 2022 at 9:02 am #68155
Thank you for laying that out. Does the BARINDEX value change over time? When I do a SHOWPLOT the value it returns 44,689, but it is a straight line, so I don’t see a value of 44,628 at all. What value is V2 actually setting? Does it change? What is the BARINDEX value for all bars? I don’t understand in V3 what the selected date of 3/8 is actually matching.May 9, 2022 at 9:19 am #68156
If you add a Show View to your chart and setup the script to:123BARDATE()
You should see a line sloping up, with each date having its own value.
That is what V2 is setting, it is showing the value for each bar (which is the format bars show a date as by default in Optuma scripting). For March 8 the date value is 44,628
V1 takes a standard date format and converts it to the value scripts can reference. This allows us to mark a specific date on the chart, without having to work out what the date in number / index format is.
V1 == V2 then marks the bar that matches our date selection.
- This reply was modified 2 weeks ago by Matthew.
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