Re: [amibroker] 'remebering' a value

["Tomasz Janeczko" <amibroker@xxxx>]

Hello,

A very similar example is included in the User's Guide: AmiBroker Formula Language "AFL Scripting Host":
[code]
EnableScript("VBScript");
hh = HHV( close, 250 );
// buy when prices reaches a new high
buy = Close == HHV( close, 250 ); 

// ensure that sell is an array, 
// sell = 0 would set the type to numbersell = buy; 

<%
close = AFL("close")
buy = AFL( "buy" )
sell = AFL("sell")
' this variable holds last buying price
' if it is zero it means that no trade is open
lastbuyprice = 0
' iterate along the array
for i = 0 to UBound( close )
sell( i ) = 0
' Remove Buy signals if trade was already initiated
if( lastbuyprice > 0 ) then
buy( i ) = 0
end if
' if there is no open trade and buy signal occurs 
' get the buying price
if ( lastbuyprice = 0 ) AND (buy( i ) = 1) then
lastbuyprice = close( i )
end if
' if trade is open and sell condition is valid 
' generate sell signal
' and close the trade
if (lastbuyprice >0 ) AND ( close( i ) > ( 1.1 * lastbuyprice ) ) then
sell( i ) = 1
lastbuyprice = 0
end if
next
AFL("buy") = buy
AFL("sell") = sell
%>
buy = buy;

[/code]

Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message ----- 
From: "sidleysh" <steves@xxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Thursday, July 11, 2002 10:29 AM
Subject: [amibroker] 'remebering' a value


> I have a simple AFL problem (as a newbie), which is straightforward 
> in traditional languages, but I cant seem to find a solution in AFL 
> 
> 1) I want to generate a buy when condition is true. 
> 2) After that I want to buy every time the closing price is x% higher 
> than the price of my previous buy. 
> 
> Because I cant 'store' the price of the previous buy, I do not how to 
> do this. 
> 
> Any ideas? 
> 
> 
> 
> 
> 
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ 
> 
> 
>