Add Comment | Related Links | TrackBack
Related Content

Extended-Hours Data Changes Parabolic SAR

This week, I have been using both E-Trade Pro and thinkorswim (TD Ameritrade's software) to chart the stock market. I noticed that the Parabolic SAR on E-Trade looks drastically different than TD Ameritrade's data. I've provided some screen shot below for comparison.

This first screen shot is from E-Trade Pro.

Attached Image:

SCO E-Trade Pro Chart.png

Mel
Fri, 23 Oct 2015 00:10:41 -0700

This second screen shot is from thinkorswim (TOS).

Attached Image:

SCO thinkorswim Chart.png

Mel
Fri, 23 Oct 2015 00:11:43 -0700

Note that E-Trade Pro has a nice smooth curve on the third column, which is actually Monday, Oct 19. (There is a bug in E-Trade Pro, where after midnight, it pushes the day label left, but doesn't push the chart left.)

On the TOS chart, the second column, which is Monday, Oct 19, the Parabolic SAR is choppy.

After scratching my head for a few days, I finally figured out the discrepancy between the two software. TOS display extended trade session data by default, which changes the Parabolic SAR values. You can disable the extended trade session data by going into "Chart Settings" and disabling "Show Extended-Hours Trading session" (see screen shot below).

Attached Image:

Chart Settings.png

Mel
Fri, 23 Oct 2015 00:19:54 -0700

After you do that, you'll see a chart similar to the E-trade Pro chart (see screen shot below).

Attached Image:

thinkorswim Chart without Extended Sessions.png

Mel
Fri, 23 Oct 2015 00:22:52 -0700

Interesting enough, the two chart are just slightly different. But the thinkorswim chart is identical to the chart on E-Trade's web site (see screen shot below).

Attached Image:

SCO Chart on E-Trade Site.png

Mel
Fri, 23 Oct 2015 00:25:30 -0700

Add Comment | Related Links | TrackBack
Related Content

Did your message disappear? Read the Forums FAQ.

Add Comment

Spam Control | * indicates required field

Your Name: *
E-mail:
	Remember Me!
Comment: *
	File attachment is optional. Please do not attach a file to your submission unless it is relevent.
Attach File: (64 MB Max)
Spam Protection: *	Answer of 8 + 9?
	Click button only once, please!

TrackBack

TrackBack only accepted from WebSite-X Suite web sites. Do not submit TrackBacks from other sites.

Send Ping | TrackBack URL | Spam Control

No TrackBacks yet. TrackBack can be used to link this thread to your weblog, or link your weblog to this thread. In addition, TrackBack can be used as a form of remote commenting. Rather than posting the comment directly on this thread, you can posts it on your own weblog. Then have your weblog sends a TrackBack ping to the TrackBack URL, so that your post would show up here.

Messages, files, and images copyright by respective owners.