Hi Tomasz, I thought that once I imported Metastock files the data was going into my AB database. In fact, when I manually open AB database's folder, I see each and every ticker. Are you sure the data is in the Metastock files at that point? (The speed issue is *not* in Real-time, but in my database that goes from last July till last week).
Scrolling is *not* immediate in my AB, even for charts with only price and MA and portfolio equity. It takes some time to lead when I scroll. I defragmented my hard drive, but still it is slow... Any idea? Thanks, Louis 2008/7/20 Tomasz Janeczko <[EMAIL PROTECTED]>: > No, they are NOT in AB local database. QCollector stores data into > Metastock databases and you > are accessing external MS database. > > Also scrolling is *immediate* for any formula shipped with AB. > If it is not on your end, it means that you are using > some formula of your own writing (or downloaded from somewhere) that takes > forever > to execute. > > Faster? Use AmiBroker own IQFeed plugin, without man-in-the-middle > (QCollector). > Still MS database should be fast enough, if it is not - it means that your > hard disk is badly fragmented. > > Best regards, > Tomasz Janeczko > amibroker.com > > ----- Original Message ----- > *From:* Louis Préfontaine <[EMAIL PROTECTED]> > *To:* [email protected] > *Sent:* Sunday, July 20, 2008 4:05 PM > *Subject:* Re: [amibroker] Speed the database!? > > Also, when I right-click to change the time displayed, it takes 3-4 seconds > and lot of loading... Any way to speed this? > > Thanks, > > Louis > > 2008/7/16 Louis Préfontaine <[EMAIL PROTECTED]>: > >> Hi Tomasz, >> >> I am using data that has already been downloaded with QCollector. Hence, >> I am running on a local database and what takes like 3-4 seconds is >> scrolling through the 1-minute bars. Let's say it is Day 1 at 11:00 and I >> want to scroll back to Day 0, I use my mouse wheel but for 3-4 seconds the >> images does not move at all, then I hear my computer loading, then I see the >> bars before. Is there a way to make that faster? >> >> Thanks, >> >> Louis >> >> 2008/7/15 Tomasz Janeczko <[EMAIL PROTECTED]>: >> >> Hello, >>> >>> No, it does NOT take 3-4 seconds to load each ticker. Loading (i.e. >>> switching between symbols) is INSTANT. >>> >>> It takes 3-4 to BACKFILL. That's huge difference. >>> >>> Are you aware that you are on 256kbps connection. That means that your >>> fully saturated connection is able >>> to deliver about 25KB of data per second. Now do you have any idea how >>> much data is one day >>> of 1-minute data? >>> >>> As far as I remember you are using IQFeed. It delivers data in ASCII >>> format. >>> >>> Let's say single quote line is 100 bytes. Compressed it is 50. Now there >>> are 60 lines per minute and >>> 480 lines per 8 hours. That's 24KB PER DAY PER SYMBOL of 1-minute data. >>> That means >>> that it takes 1-second FULLY SATURATED your internet connection to >>> deliver 1-day worth of 1-minute data for one symbol. >>> That's physical limit of your internet connection. >>> >>> Yes there is a way to get it faster: >>> a) invest in better internet connection >>> b) subscribe to data source that allows those 500 symbols to be streaming >>> c) run scan with wait for backfill PRIOR to market open. Once you >>> initialy scan all symbol >>> UNCHECK "wait for backfill" and scans will fun blazing fast. >>> >>> Best regards, >>> Tomasz Janeczko >>> amibroker.com >>> >>> ----- Original Message ----- >>> *From:* Louis Préfontaine <[EMAIL PROTECTED]> >>> *To:* [email protected] >>> *Sent:* Monday, July 14, 2008 11:02 PM >>> *Subject:* [amibroker] Speed the database!? >>> >>> Hi, >>> >>> I have my 1-minute database setted with all my tickers and everything, >>> but damn it it is so slow! It takes like 3-4 seconds to load each >>> ticker... Is there a way to make it run faster, considering I don't need >>> all the data when exploring? >>> >>> Thanks, >>> >>> Louis >>> >>> >> > >
