Dont really understand your comments ... as Low and Close frequently are below lower BB...
Try using L <= BBandBot(...) ----- Original Message ----- From: "mbausys" <[email protected]> To: <[email protected]> Sent: Thursday, April 15, 2010 8:16 AM Subject: [amibroker] Re: Change last value of array > In essence, I want to backtest a trading system that uses lower Bollinger > Band as an entry point and would enter trades intraday when price touches > the lower band. However, I can't use L < BBandBot( C, 20, 2 ) as at the > point when price is at its L, BBand would be lower than BBandBot( C, 20, > 2 ) and the trade might be not triggered in reality. Therefore, I want to > find price levels at which P would be equal or just fall below lower > BBand. That level would be my BuyPrice as well. > > Thanks, > > Marius > > > --- In [email protected], "Rob" <sidharth...@...> wrote: >> >> You said you only wanted to do it for the last day (or last value in the >> array)...? >> >> LastValue() will only access the last value in the array hence will only >> work for the last day... >> >> What exactly are you trying to do...? explain in detail and we might be >> able to help... >> >> --- In [email protected], "mbausys" <mbausys@> wrote: >> > >> > I have this very short code, which is supposed to determine at what >> > price level every day the price would have been equal to lower >> > Bollinger Band. However, the code seems to do the trick only for the >> > last day. Any hints where I may be wrong? >> > >> > P = C; // P is a target price level >> > diff = P / 2; >> > >> > for( i = 0; i < 100; i++ ) >> > { >> > P = IIf( P < BBandBot( C, 20, 2 ), C + diff, C - diff ); >> > C[ LastValue( BarIndex() ) ] = P[ LastValue( BarIndex() ) ]; >> > diff = diff / 2; >> > } >> > >> > --- In [email protected], "jooleanlogic" <jooleanl@> wrote: >> > > >> > > I think that will only work in version 5.3 Sid. >> > > >> > > BarIndex() changed from being the actual index in 5.2, to always >> > > starting at 0 in 5.3. >> > > So LastValue(BarIndex()) in 5.2 can give you a number greater than >> > > BarCount under QuickAFL. >> > > >> > > You could just use BB_Array[BarCount-1] which will always work. >> > > >> > > Jules. >> > > >> > > >> > > --- In [email protected], "Rob" <sidhartha70@> wrote: >> > > > >> > > > Sure... if BBand is the array you want to change, >> > > > >> > > > Last_Val_BI = LastValue( BarIndex()); >> > > > BB_Array [Last_Val_BI] = New value here... >> > > > >> > > > try something like that. >> > > > >> > > > --- In [email protected], "mbausys" <mbausys@> wrote: >> > > > > >> > > > > Hi all, >> > > > > >> > > > > Is there a simple way of changing the last value of an array? >> > > > > I want to find Bollinger Band of, e.g. 10 days of closing prices, >> > > > > but would like to use a different value for day 10 rather than >> > > > > the real closing price for that day. >> > > > > >> > > > > Any help would be appreciated. >> > > > > >> > > > > Many thanks, >> > > > > >> > > > > Marius >> > > > > >> > > > >> > > >> > >> > > > > > ------------------------------------ > > **** IMPORTANT PLEASE READ **** > This group is for the discussion between users only. > This is *NOT* technical support channel. > > TO GET TECHNICAL SUPPORT send an e-mail directly to > SUPPORT {at} amibroker.com > > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at > http://www.amibroker.com/feedback/ > (submissions sent via other channels won't be considered) > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > http://www.amibroker.com/devlog/ > > Yahoo! Groups Links > > > >
