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Peter, First, thanks for all the effort you put in to making the Carter’s squeeze more widely usable and efficient in TOS. Your work is truly helpful. My question: I am a little unclear as to what the “aggregation” button means when building a custom script for a watchlist. I assume it is the range to gather data. However, with the squeeze, it is either fired or not fired at any given moment. So does it really matter what the aggregation window is? Note, I am doing day trading, so I need minute-by-minute feedback in the watchlist. Do I just set the aggregation window to 1 minute then? Thanks, -Davide
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The aggregation period you select for a custom watchlist column, scan filter, study alert, or conditional order is EXTREMELY important. It is equivalent to setting the time frame on a chart. Whereas a squeeze may have fired on a 5 min chart, it may or may not have fired on a 15 min, 60 min or daily chart. So this needs to be set to whichever time frame you use to look for signals. And for a watchlist, you add multiple columns if you are tracking signals on multiple time frames, which is the specific example I gave in those videos. Marked as spam
 Posted by Pete Hahn (Questions: 37, Answers: 4118) Answered on November 5, 2017 5:24 pm
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I see, that makes sense. So if I want instant minute-by-minute feedback, then I set the aggregation to 1 minute. Got it. Thanks again, -D Marked as spam
 Posted by Davide Bianchini (Questions: 7, Answers: 12) Answered on November 5, 2017 7:53 pm
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So I have a question to ask related to this. re: Custom Scan Queries and using Aggregation periods, it seems that we have to use the predefined set (dropdown list) of Aggregation periods in TOS and that we cannot define our own. (e.g. 54 minutes) as we can do with TOS Charts. In Charting, we can specify an aggregation period of 54 minutes. If we want to do this using our own Custom Scan Queries, how would we accomplish this?
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 Posted by Gregory Wexler (Questions: 1, Answers: 5) Answered on January 11, 2018 4:48 pm
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lol, sadly, no. If you want minute by minute feedback you will need to move to TradeStation or NinjaTrader. Watchlist custom columns are updated every 3-5 minutes, confirmed by support at Thinkorswim.
Market just opened… I am getting instant updating in my watchlists… My problem though is, sometimes TOS freezes up and everything comes to a halt. Then 30 seconds later, is continues again. This happens like every 1-2 minutes… total freeze of all data flow, then unfreeze. Any ideas what may be the issue?
My experience has been similar. From time to time the application seems to accumulate little glitches of various sorts. Sometimes I just delete the entire application and reinstall it to restore order. Just make sure you have saved all your chart grid layouts because that will nuke everything and reset the workspace to default. One very helpful tip is to create a shared link of your workspace, which can be used later to load everything the way you had it before. https://www.hahn-tech.com/thinkorswim-shared-workspace/