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Hi Alan
Your answers are close but don't rate 100%. You may have mastered what is happening but I'm not so
sure you've mastered why it's coded to happen that way. In keeping with your wishes I'm not going to
explain further at this stage.
Roy
> I've been trying to understand your latch-based stop. I feel as if
> I'm disappearing up my own asymptote, but I'd prefer to work things
> out for myself if I can.
>
> If you could assert some binary responses (Y,N) to the following, I
> can use your answers to figure out what's happening.
>
> (This is your formula:
>
> {PREV Latch Exercise}
> Set:=Cross(Mov(C,15,E), Mov(C,25,E));
> Reset:=Cross(Mov(C,25,E), Mov(C,15,E));
> Trade:=If(PREV<=0,If(Set,1,0),
> If( Reset {independent exit} OR
> C>=ValueWhen(1,PREV=0,C)*1.2 {20% profit exit} OR
> C<=ValueWhen(1,PREV=0,C)*0.9 {10% loss exit} ,-1,1));
> Abs(Trade)*ValueWhen(1,Ref(Trade=0,-1),C); {trade active/entry price}
> )
>
> Q: When is Trade = -1? {a sell}
> A: Only when Trade(-1) = 1 AND (Reset = 1 OR C>20% profit OR C<10%
> stop)
> In Queen's English: a sell can only follow a buy, and only if the
> EMA signal crossed down, or 20% profit, or 10% loss.
>
> Q: When is Trade = 1? {a buy}
> A: If (a) Trade(-1) = 0 or -1 AND Set = 1
> In English: When the previous trade was a sell, or neutral (neutral
> itself can only occur after a sell or another neutral) and EMA
> crossed up.
>
> Q: What is ValueWhen doing?
> A: We want the closing price of the bar for which the immediately
> previous bar was the last occurrence of Trade=0 {did you get that?}
>
>
> Regards,
> Alan
>
>
> --- In equismetastock@xxxxxxxxxxxxxxx, "Roy Larsen" <rlarsen@xxxx>
> wrote:
> > Alan
> >
> > > At my delicate stage of development, it seems to me that "LOW"
> > > and "Ref(LOW,-1)" would be recalculated daily, which is not what I
> > > want. For example, if the low were 20 on the day that the buy
> > > conditions were satisfied, I would want it to stay at 20 (at least
> > > until I start it trailing). Am I correct in saying that it would
> be
> > > recalculated daily?
> >
> > I think this has been mentioned in a subsequent post already but
> you can use the ValueWhen()
> > function to hold a value from one event to the next. Unfortunately
> this is not a total solution
> > because an unwanted second or third event will change the returned
> value prematurely. This is where
> > the use of a PREV function may be required. It allows the storing
> of a value from an entry signal
> > until either an external exit signal OR an entry related condition
> occurs.
> >
> > How you code this will depend on exactly what it is you are wanting
> to do.
> >
> > I think that the Simulation dll functions may also be able to be
> used for what you want to do. I
> > haven't studied it yet so I'm not sure what it's potential uses
> are. Check it out.
> >
> > Here's an example of how you can use a PREV based latch to remember
> an entry value. It doesn't have
> > to be the entry price, it could just as easily be a relevant ATR or
> RSI value. Notice that the value
> > is not stored in the latch itself ('Trade' variable) but
> is "reconstituted" using ValueWhen(). It
> > takes at least one additional PREV to store the value inside
> the 'Trade' variable, and that's why I
> > prefer to have the latch function only using 1, 0 and -1. Minus 1
> is not necessary either as far as
> > that goes but it's useful though not critical.
> >
> > The 'Trade' variable can be reset either by using the
> external 'Reset' or internally by referencing
> > some current value to some value at the time of the first 'Set'
> signal. There are a zillion
> > variations you can do with this.
> >
> > {PREV Latch Exercise}
> > Set:=Cross(Mov(C,15,E), Mov(C,25,E));
> > Reset:=Cross(Mov(C,25,E), Mov(C,15,E));
> > Trade:=If(PREV<=0,If(Set,1,0),
> > If( Reset {independent exit} OR
> > C>=ValueWhen(1,PREV=0,C)*1.2 {20% profit exit} OR
> > C<=ValueWhen(1,PREV=0,C)*0.9 {10% loss exit} ,-1,1));
> > Abs(Trade)*ValueWhen(1,Ref(Trade=0,-1),C); {trade active/entry
> price}
> >
> >
> >
> >
> > Roy
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
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