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MetaStock Formulas

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SVE_Stop_Trail%

The basic trailing stop trading method formula will switch from support to resistance and visa-versa when breaking support or resistance. For the fixed percentage trailing stop method we calculate the maximum allowed loss based on a fixed percentage of the closing price.

Additionally I am showing you the formula to use a fixed percentage trailing stop from a start date for either a long or a short trade.

 

Because with this trailing stop method we are using a fixed percentage, there is not much we can try for getting a better result.

The only thing you could do is look at the past and see for each individual stock what was the best fitting percentage in a previous period and apply an individual value for each stock. This may get you a better total result. However I would advise not to deviate more than 3% of the common value to avoid too much optimization.

 

This is the formula:

SVE_Stop_Trail%

perc:=Input("Trailing Loss % :",0,100,14);
loss:=C*perc/100;
trail:=
If(C>PREV AND Ref(C,-1)>PREV,
Max(PREV,C-loss),
If(C<PREV AND Ref(C,-1)<PREV,
Min(PREV,C+loss),
If(C>PREV,C-loss,C+loss)));
Trail

 

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percentage trailing stop

Using your own trading method finding entry points you most probably would like to have this trailing stop available from your own entry date.

So, this is the MetaStock® formula  for a fixed percentage trailing stop from a starting date.

SVE_Stop_Trail%_Date

InpMonth:=Input("Month",1,12,1);
InpDay:=Input("Day",1,31,1);
InpYear:=Input("Year",1800,2050,2009);
LongShort:=Input("1=Long or 2=Short? ",1,2,1);
InitStop:=Input("Initial Stop Price",0.1,10000,10);
Perc:=Input("Trailing Stop Percentage",1,30,12);
Loss:=C*Perc/100;
Entry:= InpYear=Year() AND InpMonth=Month() AND InpDay=DayOfMonth();
EntryLock:=If(Ref(Entry,-1)=0 AND Entry=1,1,PREV);
support:=If(LongShort=1,C-loss,C+loss);
StopLong:= If(EntryLock=0 OR Entry=1,InitStop,
If(support>Ref(Support,-1),Max(support,PREV),PREV));
StopShort:= If(EntryLock=0 OR Entry=1,InitStop,
If(support>Ref(Support,-1),Min(support,PREV),PREV));
Trail:=If(LongShort=1,Stoplong,Stopshort);
Trail

 

 

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