[amibroker] How to convert this MS formula to AFL

["umrperumal" <umrperumal@xxxxxxxxx>]

Hi friends

I have the following metastock formula to be converted into AFL.
To my understanding, there are 3 issues to be converted, out of which I know solution for 2 of them.

1) assignment operator ":= " is to be changed as "="
2) "If" is to be changed as "IIF".

The third one is 'PREV' in metastock.  I have read the previous posts in this forum reg 'PREV', but frankly I could not be understand it as a non-programmer.

Shall be thankful for your help in converting this metastock formula into AFL.

Quote

Stop1:=If( PREV < L,
If(( H - 4.5*ATR(21) ) >= PREV,
( H - 4.5*ATR(21) ),
PREV),
( H - 4.5*ATR(21) ));

Stop2:=If( PREV < L,
If(( C - 3.5*ATR(21) ) >= PREV,
( C - 3.5*ATR(21) ),
PREV),
( C - 3.5*ATR(21) ));

StopLong:=If(Stop1>Stop2,Stop1,Stop2);

Stop1:=If( PREV > H,
If(( L + 4*ATR(21) ) <= PREV,
( L + 4*ATR(21) ),
PREV),
( L + 4*ATR(21) ));

Stop2:=If( PREV > H,
If(( C + 3.5*ATR(21) ) <= PREV,
( C + 3.5*ATR(21) ),
PREV),
( C + 3.5*ATR(21) ));

StopShort:=If(Stop1<Stop2,Stop1,Stop2);

If( ((Year()<=2008) OR (Year()=2009 AND Month()<=04 AND DayOfMonth()<=31)), 
If((BarsSince(L<Ref(StopLong,-1))>BarsSince(H>Ref(StopShort,-1)) ),StopLong,StopShort),C);

Unquote

With best regards

UMR Perumal



------------------------------------

**** 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

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/amibroker/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/amibroker/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:amibroker-digest@xxxxxxxxxxxxxxx 
    mailto:amibroker-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    amibroker-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/