Pullback Scan

lbrownjr

Hello, I am writing a script for pullbacks. Seems I am having issues when trying to add the inside day to my scan. I am trying to accomplish 3 days of lower daily lows, or two days of daily lower lows and an inside day. Thanks in advance

[type is stock]
and [country = US]
and [ [exchange is NYSE]
or [exchange is NASDAQ] ]
and [Volume > 500,000]
and [Close > 10]
and [Close > sma(20)]
and [Close > sma(50)]
and [ [Low IS BELOW 1 day ago low]
and [1 day ago Low IS BELOW 2 days ago low]
or [Low IS BELOW 1 day ago low]
and [1 day ago Low IS BELOW 2 days ago low]
and [High IS BELOW 1 day ago High]
and [Low IS ABOVE 1 day ago Low] ]

markd

"OR" conditions are tricky.

See if this re-grouping does it. I've added a pair of brackets around the two lines of the first "or" condition and another pair around the four lines of the second "or" condition.

P.S. I only checked the brackets, not the logic of each line.


[type is stock]
and [country = US]
and [ [exchange is NYSE]
or [exchange is NASDAQ] ]
and [Volume > 500,000]
and [Close > 10]
and [Close > sma(20)]
and [Close > sma(50)]
and

[ // begin "or"

[ // first "or" group

[Low IS BELOW 1 day ago low]
and [1 day ago Low IS BELOW 2 days ago low]

] // end first or group

or

[ // begin second "or" group

[Low IS BELOW 1 day ago low]
and [1 day ago Low IS BELOW 2 days ago low]
and [High IS BELOW 1 day ago High]
and [Low IS ABOVE 1 day ago Low]

] // end second or group

] // end "or"

lbrownjr

Thanks for you response, are you suggesting my script look like this?

[type is stock]
and [country = US]
and [ [exchange is NYSE]
or [exchange is NASDAQ] ]
and [Volume > 500,000]
and [Close > 10]
and [Close > sma(20)]
and [Close > sma(50)]
and
[[Low IS BELOW 1 day ago low]
and [1 day ago Low IS BELOW 2 days ago low]]
or
[[Low IS BELOW 1 day ago low]
and [1 day ago Low IS BELOW 2 days ago low]
and [High IS BELOW 1 day ago High]
and [Low IS ABOVE 1 day ago Low]]

I am very new to writing scripts. Thx

markd

I do it my way because I think its easier to read.

If your version has the same placement of brackets, then it's the same.

The slashes // are comment symbols, meaning the scan engine does not read anything after // on the same line.

Also, the scan engine allows blank lines - it figures out where the opening and closing brackets are and which goes with which even across multiple lines. So you can space out the scan lines as I did for readability. But everyone is different and your way is fine if it works for you.

lbrownjr

Thanks, I just copied yours as is and I get the same results. I am working at it; I like your look better, still having trouble getting the right results once I implement the last four lines. All looks good until I add those parameters. Frustrating

lmkwin

I'd may suggest replacing IS BELOW with a < symbol. Although some things may "pass" syntax checks, the current scan engine may disregard or misinterpret some of the original "common english" allowable terminology.

lbrownjr

Thanks @lmkwin and @markd I now have a scan functioning the way it was intended. Changing the IS Below/IS Above to <> symbols did the trick. Can't get the time back I wasted trying to figure this out, but considering it education. Thx Again

markd

I was going to say "IS BELOW" is not allowed but when I pasted the scan into the workbench it produced no errors. But as @lmkwin says, there are some quirks sometimes, apparently.