I forgot: take also a look at this doc page http://www.amibroker.com/f?setoption
specifically "PriceBoundChecking" option Best regards, Tomasz Janeczko amibroker.com ----- Original Message ----- From: "Tomasz Janeczko" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, December 04, 2006 4:37 PM Subject: Re: [amibroker] Re: Selling price not set properly sometimes > Intermilan, > > Terry is right and you are wrong. > > You are doing the following things wrong: > > 1. Never delay trade PRICES. > SellPrice = Ref(Open, -1 ); // WRONG ! > > Did you read the User's Guide Tutorial about backtesting? > http://www.amibroker.com/guide/h_backtest.html > > it is must-read. Come on this is not so much text inside > so it is pretty easy to read it as many times as needed > to absorb or at least keep in handy and take a look in case of > doubt. > > And it says: > > " > Controlling trade price > > [...] > During back-testing AmiBroker will check if the values you assigned to > buyprice, sellprice, shortprice, coverprice fit into > high-low > range of given bar. If not, AmiBroker will adjust it to high price (if price > array value is higher than high) or to the low price > (if price array value is lower than low)" > > > >> I had to design this way because if I simply buy today and sell >> tomorrow morning, AmiBroker cannot make tomorrow's purchase (since my >> equity is still held up by yesterday's purchase), then sell my stocks >> from today and leave me with cash. > > Your description is convoluted enough to become un-cipherable > ("can not make TOMMORROWS purchaase and THEN SELL stocks from TODAY"???? > - do we have time-space-continuum preserved here or not?) > > > There is however no problem in entering / exiting positions in way described > here > >>> 1. I scan for signals on Day 1. >>> 2. I buy signaled stocks at the open on Day 2. >>> 3. I sell stocks at the open on Day 3. > > One thing to watch for is to turn off "allow same day exit". > > Best regards, > Tomasz Janeczko > amibroker.com > ----- Original Message ----- > From: "intermilan04" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Sunday, December 03, 2006 11:09 PM > Subject: [amibroker] Re: Selling price not set properly sometimes > > >> Hi Terry, >> >> SellPrice = Open would not work, because I'm selling on the same day >> of purchase but appending tomorrow's opening price as my SellPrice. >> >> I had to design this way because if I simply buy today and sell >> tomorrow morning, AmiBroker cannot make tomorrow's purchase (since my >> equity is still held up by yesterday's purchase), then sell my stocks >> from today and leave me with cash. >> >> Regards, >> >> intermilan04 >> >> --- In [email protected], "Terry" <[EMAIL PROTECTED]> wrote: >>> >>> Just set SellPrice = Open; >>> >>> You are trying to "fix" something that Amibroker already handles with >>> SetTradeDelays. >>> >>> // Options >>> SetTradeDelays(1, 1, 1, 1); >>> >>> BuyPrice = SellPrice = Open; >>> Buy = SomeCondition; >>> Sell = Ref(Buy, 0); >>> >>> -- >>> Terry >>> -----Original Message----- >>> From: [email protected] [mailto:[EMAIL PROTECTED] >> On Behalf >>> Of intermilan04 >>> Sent: Saturday, December 02, 2006 21:15 >>> To: [email protected] >>> Subject: [amibroker] Selling price not set properly sometimes >>> >>> Hi all, >>> >>> I have a trading system which is intended to work in the following way: >>> >>> 1. I scan for signals on Day 1. >>> 2. I buy signaled stocks at the open on Day 2. >>> 3. I sell stocks at the open on Day 3. >>> >>> In a nutshell, here is a portion of my code that are relevant. >>> >>> // Options >>> SetTradeDelays(1, 1, 1, 1); >>> >>> Buy = SomeCondition; >>> BuyPrice = Open; >>> Sell = Ref(Buy, 0); >>> SellPrice = Ref(Open, 1); >>> >>> I'm deliberately doing Sell = Ref(Buy, 0); so that I can free up my >>> Equity for next day's purchase of new stocks. If I do Ref(Buy, 1), >>> the Backtester tries to buy stocks next morning, can't do so because I >>> have positions from previous day, and sell my stocks, and I end up >>> with a cash position which could have been utilized on new stocks. >>> >>> Well, that became a lengthy explanation but the problem is the >>> SellPrice = Ref(Open, 1); code. While it works most of the times, it >>> does not work 100%. Here is a situation where it failed; >>> >>> Ticker Trade Date Price Ex. date Ex. Price % chg >>> Profit % Profit >>> REGN Long 2006/11/30 21.5 2006/11/30 21.54 0.19% 18 >>> 0.10% >>> OVTI Long 2006/11/30 16.6 2006/11/30 16.04 -3.37% -574 >>> -3.46% >>> TLAB Long 2006/11/30 9.99 2006/11/30 10.05 0.60% 88 >>> 0.52% >>> BRCM Long 2006/11/30 32.88 2006/11/30 32.66 -0.67% -124 >>> -0.75% >>> >>> I have no problem with REGN, TLAB, BRCM; the Ex. Price is that of the >>> Open price of next day. >>> But for OVTI, the 16.04 exit price is filthily wrong. The stock >>> gapped down big time to 14.22, and my AmiBroker quote for OVTI of 12/1 >>> shows 14.22 as well, so it is not the case of me having corrupted >>> quote data. It appears that the 16.04 exit price is the low price of >>> the day, but then, I never set my SellPrice at Low. >>> >>> I will greatly appreciate any insights as to why my problem has >>> occurred. It's driving me crazy because if things like this happen, I >>> might get rosier results than what reality might bring. >>> >>> Regards, >>> >>> intermilan04 >>> >>> >>> >>> Please note that this group is for discussion between users only. >>> >>> To get support from AmiBroker please send an e-mail directly to >>> SUPPORT {at} amibroker.com >>> >>> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: >>> http://www.amibroker.com/devlog/ >>> >>> For other support material please check also: >>> http://www.amibroker.com/support.html >>> >>> Yahoo! Groups Links >>> >> >> >> >> >> Please note that this group is for discussion between users only. >> >> To get support from AmiBroker please send an e-mail directly to >> SUPPORT {at} amibroker.com >> >> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: >> http://www.amibroker.com/devlog/ >> >> For other support material please check also: >> http://www.amibroker.com/support.html >> >> Yahoo! Groups Links >> >> >> >> >> > > > > Please note that this group is for discussion between users only. > > To get support from AmiBroker please send an e-mail directly to > SUPPORT {at} amibroker.com > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > http://www.amibroker.com/devlog/ > > For other support material please check also: > http://www.amibroker.com/support.html > > Yahoo! Groups Links > > > > >
