The Turtle Trading System is a very simple and very easy to understand.
It's an Asymetric Channel Breakout :
* Enter long above the highest high of the previous X days and exit with a stop based on the lowest low of the Y previous days with Y < X
* Enter short below the lowest low of the previous W days and exit with a stop based on the highest high of the Z previous days with Z < W
Parameters
Y = length of channel for longs W = length of channel for shorts =cut
sub new {
my $type = shift;
my $class = ref($type)
|| $type;
my $args = shift;
my $self = { "args" => defined($args) ? $args : [ 55, 20 ] };
return manage_object(\@NAMES, $self, $class, $self->{'args'}, ""); }
sub initialize { my ($self) = @_;
$self->{'max'} = GT::Indicators::Generic::MaxInPeriod->new([ $self->{'args'}[0], "{I:Prices HIGH}"]); $self->{'min'} = GT::Indicators::Generic::MinInPeriod->new([ $self->{'args'}[1], "{I:Prices LOW}"]);
$self->add_indicator_dependency($self->{'min'}, 2); $self->add_indicator_dependency($self->{'max'}, 2); $self->add_prices_dependency($self->{'args'}[0] + 1); $self->add_prices_dependency($self->{'args'}[1] + 1); }
sub precalculate_interval { my ($self, $calc, $first, $last) = @_; $self->{'max'}->calculate_interval($calc, $first, $last); $self->{'min'}->calculate_interval($calc, $first, $last);
return; }
sub long_signal { my ($self, $calc, $i) = @_;
return 0 if (! $self->check_dependencies($calc, $i));
if ( ( $calc->prices->at($i)->[$CLOSE] > $calc->indicators->get($self->{'max'}->get_name, $i - 1) ) ) { return 1; } return 0; }
sub short_signal { my ($self, $calc, $i) = @_;
return 0 if (! $self->check_dependencies($calc, $i));
if ( ( $calc->prices->at($i)->[$CLOSE] < $calc->indicators->get($self->{'min'}->get_name, $i - 1) ) ) { return 1; } return 0; }
1;