Does current bar touch or cross my trendline?

[shildebrand324]

Chelsea B, I'm very, very appreciative for your help thus far. I think I am almost there.

The yintercept is giving me very small numbers. Can you check my math here? I'm not understanding how the below gives me the yintercept.

double trendSlope = (channel.TrendEndAnchor.Price - channel.TrendStartAnchor.Price) / (Bars.GetBar(channel.TrendEndAnchor.Time) - Bars.GetBar(channel.TrendStartAnchor.Time));
double yintercept = trendSlope * ((CurrentBar-1) - Bars.GetBar(channel.TrendStartAnchor.Time));

Output:

Tag: Trend channel 15 Start Price: 3674.75832167832 End Price 3671.35916083916 Start Bars Ago: 3607 End Bars Ago: 3611 Slope: -0.849790209790285 yintercept: -1.69958041958057

[shildebrand324]

Anyone around today?

[NinjaTrader_Jesse]

Hello shildebrand324,

Do you still see the problem if you use the following calculation instead? If that is not a solution could you attach another small excerpt of the output and logic used?

double yintercept = trendSlope * Bars.GetBar(channel.TrendStartAnchor.Time) - channel.TrendStartAnchor.Price;

I look forward to being of further assistance.

[shildebrand324]

Still no luck...don't I need the current bar somewhere to see if it crossed the yintercept?


Here's the print output:

Tag: Trend channel Start Price: 3632.39289017421 End Price 3648.13162777306 Start Bars Ago: 3487 End Bars Ago: 3501 Slope: 1.12419554277497 yintercept: -163.450039085016

Here's the loop:

foreach (DrawingTool draw in DrawObjects)
{
if (draw is DrawingTools.TrendChannel)
{
TrendChannel channel = draw as DrawingTools.TrendChannel;
double parallelEndAnchorPrice = channel.ParallelStartAnchor.Price + (channel.TrendEndAnchor.Price - channel.TrendStartAnchor.Price);
int parallelEndAnchorBar = Bars.GetBar(channel.ParallelStartAnchor.Time) + (Bars.GetBar(channel.TrendEndAnchor.Time) - Bars.GetBar(channel.TrendStartAnchor.Time));
double trendSlope = (channel.TrendEndAnchor.Price - channel.TrendStartAnchor.Price) / (Bars.GetBar(channel.TrendEndAnchor.Time) - Bars.GetBar(channel.TrendStartAnchor.Time));
double yintercept = trendSlope * ( Bars.GetBar(channel.TrendStartAnchor.Time) - channel.TrendStartAnchor.Price);



Print("Tag: " + draw.Tag + " Start Price: " + channel.TrendStartAnchor.Price + " End Price " + channel.TrendEndAnchor.Price + " Start Bars Ago: " + Bars.GetBar(channel.TrendStartAnchor.Time) + " End Bars Ago: " + Bars.GetBar(channel.TrendEndAnchor.Time) + " Slope: " + trendSlope + " yintercept: " + yintercept);


}
}

[shildebrand324]

Okay, so I'm totally confused on how this gets me the y intercept, based on the equation below, based on the data generated from chart.
The y intercept seems too low for me to compare the close of the current bar price to see if it crossed. What am I missing?

Print output:
Trendline Start Anchor Price: 3632.4458825567
Trendline End Anchor Price 3646.06492485604
Trendline Start Bars Ago: 3444
Trendline End Bars Ago: 3456
Current Bar: 3451
Slope: 1.13492019161182
yintercept: 7.94444134128272

Calcs
slope between anchors = (anchor2price - anchor1price) / (anchor2bar - anchor1bar)
(slope = (y2 - y1)/(x2 - x1))
(slope = (3646 - 3632) / (3456 - 3444))

yintercept = slope * (CurrentBar - anchor1bar)
(yintercept = slope * (x2 - x1))
(yintercept = 1.13 * (3451 - 3444))

Then you can check if the yintercept is equal to the current bar close, or within a tick or within the high and low, or whatever you would like

[shildebrand324]

So, figured out I had to take the yintercept and add it to the start anchor price to get the projection.