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Hi Tuzo,
Thanks for those explanation. I kind of missed your reply with all the messages on the board, but it really helps me to understand how it works. I think I now understand that this is a loop and that each value of [i] is simply the bar and that it goes up and that each time the program looks to see if the conditions are met.
I will try to experiment further with this code.
Thanks!
Louis
2008/2/23, tuzo_wilson <j.tuzo.wilson@xxxxxxxxx>:
--- In amibroker@xxxxxxxxxxxxxxx, "Louis Pr�fontaine" <rockprog80@xxx> wrote:
> Wouldn't it be possible to simply write
>
> if( Buy[ i ] )
> {
> priceatbuy = BuyPrice[ i ];
> }
>
> instead of
>
>
> if( priceatbuy == 0 AND Buy[ i ] )
> {
> priceatbuy = BuyPrice[ i ];
> }
The Buy array may have multiple buy signals (i.e. non zero entries) so you can't just use the Buy array.
> if the priceatbuy value was already set to zero before the "for" command? I
> mean: we already know that the only possible value of priceatbuy at this
> point was zero, so why add the if (priceatbuy == 0... ? and not simply if
That's not true. priceatbuy is set within the for loop. As its name indicates priceatbuy is used to hold the price when the buy signal was issued. Plus it is also being used to let you know if you are not in a trade (priceatbuy == 0) so from a logical point of view it is holding more than just the buy price information.
You could rewrite it differently:
isInTrade = False;
priceatbuy = 0;
highsincebuy = 0;
exit = 0;
for ( i = 0; i < BarCount; i++ )
{
// if we are not in a trade and we have a buy signal then set the buy price
if ( NOT isInTrade AND Buy[ i ] )
{
// now we are in a trade so set the buy price
isInTrade = True;
priceatbuy = BuyPrice[ i ];
}
// if we are in a trade then check to see if we hit the profit target
if ( isInTrade )
{
highsincebuy = Max( High[ i ], highsincebuy );
if( exit == 0 AND
High[ i ] >= ( 1 + FirstProfitTarget * 0.01 ) * priceatbuy)
// reset isInTrade = False;
}
}
The logic is is the same but maybe expressing it that way makes more sense to you?
Tuzo
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