Because of bars since you are using variable-period variant and due to restarts required is much slower than constant period. Instead of HHV you should be using HighestSince function. So instead your entire formula use just 2 lines:
bi = BarIndex(); result = HighestSince( BeginValue( bi ) == bi, Close ); Best regards, Tomasz Janeczko amibroker.com ----- Original Message ----- From: Ken Close To: [email protected] Sent: Wednesday, October 29, 2008 4:09 PM Subject: [amibroker] Code Change Question for HHV -- Was: RT AB Sluggish at Small Time Settings -- TJ or anyone: That was helpful. Formula has an HHV(C,period); function. Period is calculated below: bi = BarIndex(); bv = BeginValue(bi); ev = EndValue(bi); sv = SelectedValue(bi); Length = ev - bv; Days = ev - sv;//EndValue(BarIndex()) - SelectedValue(BarIndex()); Sbv = IIf(bi == bv,1,0); Period = BarsSince(Sbv); The HHV function takes all the time, but the sluggishness occurs when there is no BeginValue (Green) pole set and 10 min or 5 min Interval is set. Period thus becomes all of the bars, and the HHV function takes all of the time (Check and Profile said 9 seconds, which seems like 1 minute). Question1: is there a fast execution HHV procedure that can be written (faster than HHV)? What would it be? Question2: assuming I stay with HHV, how do I limit the length of processing if there is no Green pole (BeginValue) set on the screen (thus limiting bars processed). I tried something using the Min function but did not improve anything. Any simple coding suggestions for my questions? Ken ------------------------------------------------------------------------------ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Tomasz Janeczko Sent: Wednesday, October 29, 2008 6:44 AM To: [email protected] Subject: Re: [amibroker] RT AB Sluggish at Small Time Settings Hello, Go to Formula Editor, select Tools->Check And Profile and found bottleneck in your formula using profiler timing. Best regards, Tomasz Janeczko amibroker.com ----- Original Message ----- From: Ken Close To: [email protected] Sent: Wednesday, October 29, 2008 11:41 AM Subject: [amibroker] RT AB Sluggish at Small Time Settings Can someone suggest what I may check or diagnosis to get a handle on and fix for this problem. I have used AB with my QuoteTracker feed for over a year now. Of course I have some gaps in my data because QT and my source, Fidelity account, will not permit backfills. Suddenly, yesterday, AB is totally bogged down if I select 5 minute data. When I start it up, it automatically comes up in hourly mode and is ok. Switching pole positions for example is almost instantaneous. If I switch to 15 min display, I get a noticeable delay, maybe 3 to 5 seconds for the pole to appear. (I also have the Task Manager open and can watch broker.exe jump to the top of CPU usage and then drop down. If I click on 5 min data, CPU goes to 100%, Broker.exe is pegged at near 92 to 95% and it will take literally 1 to 2 minutes to get the cursor back. Again, the day before yesterday, everything worked fine. What changed? Nothing that I know of. I was experimenting with a rather long formula file (developed in EOD environment), and earlier versions worked ok, but maybe this had something to do with the slowdown. I deleted the formula from the RT database, and rebooted the computer. What else can I try and what other data can I gather to diagnose this problem? Thanks. Running AB 5.19, with XP and plenty of RAM and HD
