convert NT7 MA "instantaneous slope" calc to NT8

[llanqui]

I have the attached code from NT7 that calculated the "Instantaneous Slope" of a moving average. This is not the same as Angle, Degree, or Radian!

Any advice on how to do this in NT8?

[llanqui]

Because this code came from NT7, most of the code is commented out. Have not tried to compile it in NT8

so, the double slash "//" in NT7 would not be commented

four slashes "////" was commented in NT7

[llanqui]

I will pull out all the variables I need and post here

[NinjaTrader_Gaby]

Hello llanqui,

Thank you for your post.

If this is not a script that you have written, I would recommend you contact the vendor that creates the NT7 version and inquire if there is a new version available for NT8.

If this is a script you have created that you would like to port to NT8, my advice is to start by creating as much of the script as possible in NinjaTrader 8 using the Strategy Builder (or Strategy Wizard).

This will create the framework of the indicator or strategy which has large changes from NT7 to NT8.

Then copy all code from the NT7 scripts OnBarUpdate to the OnBarUpdate of the NT8 script.

This will introduce errors that will need to be resolved. The help guide will be the best way to see how things have changed from nt7 to nt8.

Below I am including a link to a list of the code breaking changes from NT7 to NT8.

http://ninjatrader.com/support/helpGuides/nt8/en-us/?code_breaking_changes.htm

When first starting to port scripts, I myself would open the NT7 help guide and the NT8 help guide to the same sections so that I could compare.

The majority of code supported by NinjaTrader is included in the help guides.

While NT7 renders in GDI+ in the Plot override, NinjaTrader 8 renders with SharpDx using OnRender(). Below is the HG Page for OnRender():

https://ninjatrader.com/support/helpguides/nt8/chartstyle_onrender.htm

If you get stuck at anytime looking for equivalent code for NT8, please let us know what particular code you are having trouble converting.

[llanqui]

this originally came from the Big Mike Trading forum, some time ago....

what I need to do is to identify the variables needed from ChartTrader / Panel and then see if I can map these to NT8

[NinjaTrader_Gaby]

Hello Ilanqui,

I'm not seeing anything in the code posted that references the ChartTrader, what in specific are you trying to obtain?

[llanqui]

#

this is NT7 code from the long ago Big Mike Trading forum

the arguments for the method CalcSlope prefixed by a_ come from Plot Override

region Plot.Override
// public override void Plot(Graphics graphics, Rectangle bounds, double min, double max)
// {
// int bars;
//
// // Default plotting in base class.
// base.Plot(graphics, bounds, min, max);
//
// if (Historical)
// return;
//
// if (!p_DisplaySlopesBR)
// return;
//
// if (base.Bars == null)
// return;
//
//// bars = CalculateOnBarClose ? (ChartControl.BarsPainted - 2) : (ChartControl.BarsPainted - 1);
//
//// bars = ChartControl.BarsPainted - 1;
//
// bars = ChartControl.BarsPainted;
//
// CalcSlope (graphics, bounds, min, max, this.EMA13, 4, Color.Green, bars);
// CalcSlope (graphics, bounds, min, max, this.SMA20, 3, Color.Orange, bars);
// CalcSlope (graphics, bounds, min, max, this.SMA50, 2, Color.Brown, bars);
// CalcSlope (graphics, bounds, min, max, this.SMA100, 1, Color.Red, bars);
// }
#endregion

================================================== =================================================

region CalcSlope
// private void CalcSlope (Graphics a_graphics, Rectangle a_bounds, double a_min, double a_max, DataSeries a_MASeries, int a_BoxNum, Color a_boxColor, int a_Bars)
// {
// int degrees = 0;
// int index = -1;
// double slope = 0;
// bool found = false;
// int barx = a_Bars;

// while (barx >= 0)
// {
// index = ((ChartControl.LastBarPainted - ChartControl.BarsPainted) + 1) + barx;
// if (ChartControl.ShowBarsRequired || ((index - base.Displacement) >= base.BarsRequired))
// {
// double val = a_MASeries.Get(index);
// if (!double.IsNaN(val) && (val != 0))
// {
// int y2 = (a_bounds.Y + a_bounds.Height) - ((int) (((val - a_min) / ChartControl.MaxMinusMin(a_max, a_min)) * a_bounds.Height));
// val = a_MASeries.Get(index+1);
// if (!double.IsNaN(val) && (val != 0))
// {
// int y1 = (a_bounds.Y + a_bounds.Height) - ((int) (((val - a_min) / ChartControl.MaxMinusMin(a_max, a_min)) * a_bounds.Height));

// val = a_MASeries.Get(index+2);
// if (!double.IsNaN(val) && (val != 0))
// {
// if (!found)
// {
// found = true;
// slope = ((180/Math.PI) *(Math.Atan((a_MASeries.Get(index)-((a_MASeries.Get(index+1)+a_MASeries.Get(index+2))/2))/1.5/TickSize)))*-1;
// degrees=(int) slope;
// break;
// }
// }
// }
// }
// }
// barx--;
// }

[NinjaTrader_Gaby]

Hello,

I'm not seeing anything in this code referencing ChartTrader per your last post, do you mean ChartControl?

Below is the equivalent Help Guide documentation for ChartControl for NT8:

https://ninjatrader.com/support/helpGuides/nt8/chartcontrol.htm

NinjaTrader 8 renders with SharpDx using OnRender() instead of Plot(). The HG page for OnRender is included in Post #4.

[llanqui]

sorry, I meant ChartControl

[llanqui]

probably I can find what I need in the help page you sent

I can't always navigate well in your help system

I think you also offer a PDF Help...can I download that?

[llanqui]

muchas gracias

[NinjaTrader_Gaby]

Unfortunately at this time there is no downloadable version of the Help Guide.