Hi MIke, thank you very much for your kind help.... probably i wil have to try some technique abandoning this idea...coz it does not seem working....
--- In amibroker@yahoogroups.com, "Mike" <sfclimb...@...> wrote: > > Shahariar, > > You will need to clarify what you mean by "when the value of this cond1 is > greater than the last time when this cond1 occured". > > cond1 is a binary result and will thus only ever have 2 values: 0 or 1. There > will never be a case where a later cond1 was greater than a prior cond1 since > for all instances that cond1 is true, they will all be 1. > > If you mean that you want the difference between the two averages to be > greater, then use that in the ValueWhen expression. > > difference = ema(close,3) - ema(close,15) > cond1= differnece > 0; > Buy = cond1 AND difference > ValueWhen(cond1, difference, 2); > > Similarly, if you mean either of ema(close,3) or ema(close,15), then use that > in the ValueWhen expression. > > ema3 = ema(close, 3); > ema15 = ema(close, 15); > difference = ema3 - ema15; > cond1= differnece > 0; > Buy = cond1 AND ema3 > ValueWhen(cond1, ema3, 2); > > Mike > > --- In amibroker@yahoogroups.com, "shahariar4" <shahariar4@> wrote: > > > > Mike, thank you very much again for taking your time out...i have tried > > your indicated way but i think its not working and its not what i ment may > > be...may be my mention of pivots created the confusion. > > > > suppose, > > > > cond1= ema(clsoe,3)>ema(close,15); > > > > now i want to add another condition to form the Buy when cond1 occurs and > > when the value of this cond1 is greater than the last time when this cond1 > > occured. > > > > ----In a trending stock the price should go up and up creating waves; this > > way i would know that when the cond1(one of my buy criteria) has occured it > > is at a higer price then the previous time when it occured...and at higer > > place of the wave----- > > > > Any last bit of help will be very nice of you. > > > > Regards, > > > > Shahariar > > > > > > --- In amibroker@yahoogroups.com, "Mike" <sfclimbers@> wrote: > > > > > > Well, you're question is actually a bit complicated. The direct answer > > > would be: > > > > > > Trigger = ...; > > > Buy = Trigger AND Close > ValueWhen(Trigger, Close, 2); > > > > > > The above assumes that you wanted to buy on the trigger bar and that you > > > would know immediately that that bar was in fact a trigger. We use a > > > lookback of 2 since 1 would map to the current bar (which is also a > > > trigger bar). > > > > > > Where it gets complicated is that in your example you mentioned pivot > > > low. You can never know whether a bar was a pivot low until one or more > > > bars into the future. Therefore, you must alter the code to make the > > > trigger be the point at which you can actually recognize the pivot low as > > > being such (i.e. the bar one or more bars in the future from the actual > > > pivot low at which point you are able to look back and say "yes, that was > > > the pivot low"). See AFL Library for examples > > > http://www.amibroker.com/library/detail.php?id=353 > > > > > > That being the case, you must use ValueWhen for both the Close of the > > > current pivot low and of the one preceding it: > > > > > > PivotLow = ...; > > > Trigger = ...; > > > > > > Buy = Trigger AND ValueWhen(PivotLow, Close, 1) > ValueWhen(PivotLow, > > > Close, 2); > > > > > > Mike > > > > > > --- In amibroker@yahoogroups.com, "shahariar4" <shahariar4@> wrote: > > > > > > > > Hi MIke: > > > > > > > > Thanks for your correction. my basic idea is to suppose i have a buy > > > > signal; that buy signal's bar has to be of higher value that the last > > > > bar where anothe rbuy signal occured. > > > > > > > > > > > > suppose for example i want to buy on pivot low signal,but i want to add > > > > a codnition to it that if this pivot is of higer value than the last > > > > pivot low that occured; > > > > > > > > > > > > this way i would know if the stock is in short trend or not...as > > > > tredning stocks should create higer pivotlows in itsd way up.... > > > > > > > > so, i want to refence the last pivotlow > > > > > > > > like we refer last clsoing pice as C>ref(c,-1) how it could be done for > > > > pivotlow Pivotlow>last pivotlow.... > > > > > > > > Any idea would be aprreciated and thanks in advance for you help. > > > > > > > > Regards, > > > > > > > > Shahariar > > > > --- In amibroker@yahoogroups.com, "Mike" <sfclimbers@> wrote: > > > > > > > > > > Your logic is flawed. Cond3 can never be true. > > > > > > > > > > Note that Cross returns 1 or 0. So, there are 3 possible scenarios > > > > > for any two sequential Cond1 values x,y where x is the previous bar > > > > > value and y is the current bar value: > > > > > > > > > > 0, 0 zero followed by a zero (no recent cross) > > > > > 0, 1 zero followed by a one (cross = true on current bar) > > > > > 1, 0 one followed by a zero (cross = true on previous bar) > > > > > 1, 1 (not possible since cross cannot happen twice in a row) > > > > > > > > > > Now look at your Ref statement, Ref(Cond1, Cond1 - 1), for each > > > > > scenario: > > > > > > > > > > 0, 0 -> Ref(Cond1, 0 - 1) gives previous bar value of 0 > > > > > 0, 1 -> Ref(Cond1, 1 - 1) gives current bar value of 1 > > > > > 1, 0 -> Ref(Cond1, 0 - 1) gives previous bar value of 1 > > > > > > > > > > And your final logic of Cond1 > Ref(Cond1, Cond1 - 1) > > > > > > > > > > 0, 0 -> 0 : 0 not greater than 0 > > > > > 0, 1 -> 1 : 1 not greater than 1 > > > > > 1, 0 -> 1 : 0 not greater than 1 > > > > > > > > > > > > > > > Mike > > > > > > > > > > --- In amibroker@yahoogroups.com, "shahariar4" <shahariar4@> wrote: > > > > > > > > > > > > Hi, All Memebrs, > > > > > > > > > > > > Some little help in needed for the following idea. > > > > > > > > > > > > I have tried a code as follows but it does not show any result or > > > > > > arrow...what am i making wrong? > > > > > > > > > > > > Buy= when cond1 occurs and this cond1 has to be of higer value than > > > > > > the last cond1 > > > > > > > > > > > > > > > > > > Cond1=Cross( ZLTyp, ZLHa ); > > > > > > Cond2=Cross( ZLHa, ZLTyp ); > > > > > > Cond3= Cond1> Ref(Cond1,Cond1 -1); > > > > > > > > > > > > > > > > > > Buy=IsTrue(Cond1 AND Cond3); > > > > > > > > > > > > > > > > > > // Suppose i am using a pivotlow as my buy signal, if the pivotlow > > > > > > my scan ditercts during scan, that pivotlow has to be at higer > > > > > > position than the previous pivotlow; so as like finding an uptrend > > > > > > with pivots........ > > > > > > > > > > > > > > > > > > > > >
