Creating a plot at N% retracement of a MIN/MAX range (N period)

[mazpat_3]

Hi all

I would like to know if the following public indicator (TcFAutoFibos - NinjaTrader Ecosystem - thanks @Xusto91 !) could be extended or modified to create a plot/signal when price retraces to a certain ratio level of the MIN/MAX range? Using the fib drawing tool is not a must, though a nice to keep for visuals.

Example pseudo code for a retracement in an uptrend market - ratio can be 0.5, 0.618, etc

// the last swing high comes AFTER the last swing low

if highest_swing_time > lowest_swing_time:
(max_level - (max_level-min_level)*ratio)

Example pseudo code for retracement in a downtrend market - ratio can be 0.5, 0.618, etc

// the last swing high comes BEFORE the last swing low

if highest_swing_time < lowest_swing_time:
(min_level + (max_level-min_level)*ratio)

Right now the indicator draws an autofib looking back N period (Strength param), but does not generate plots or signals for retracement levels. In the end the idea would be to think of a strategy leveraging those signals.

Code excerpt

        protected override void OnStateChange()
        {
            if (State == State.SetDefaults)
            {
                Description                                    = @"Automatically draw fibonacci retracements from swing highs and lows in the market.";
                Name                                        = "TcFAutoFibos";
                Calculate                                    = Calculate.OnBarClose;
                IsOverlay                                    = true;
                DisplayInDataBox                            = true;
                DrawOnPricePanel                            = true;
                DrawHorizontalGridLines                        = true;
                DrawVerticalGridLines                        = true;
                PaintPriceMarkers                            = true;
                ScaleJustification                            = NinjaTrader.Gui.Chart.ScaleJustification.Right;
                //Disable this property if your indicator requires custom values that cumulate with each new market data event.
                //See Help Guide for additional information.
                IsSuspendedWhileInactive                    = true;
                Strength                    = 20;
            }
            else if (State == State.Configure)
            {
                min=MIN(Low,Strength);
                max=MAX(High,Strength);
            }
        }

        protected override void OnBarUpdate()
        {
            if (CurrentBar<Strength)
                return;

            if (High[0]>max[1])
                barsSinceHigh=0;
            else if (barsSinceHigh>-1 && IsFirstTickOfBar)
                barsSinceHigh++;

            if (Low[0]<min[1])
                barsSinceLow=0;
            else if (barsSinceLow>-1 && IsFirstTickOfBar)
                barsSinceLow++;

            if (Math.Min(barsSinceHigh,barsSinceLow)<=0)
                return;

            if (barsSinceHigh<barsSinceLow)            
                fib=Draw.FibonacciRetracements(this,"fib",IsAutoScale,barsSinceLow,Low[barsSinceLow],barsSinceHigh,High[barsSinceHigh]);            
            else
                fib=Draw.FibonacciRetracements(this,"fib",IsAutoScale,barsSinceHigh,High[barsSinceHigh],barsSinceLow,Low[barsSinceLow]);
        }

        #region Properties
        [Range(1, int.MaxValue)]
        [NinjaScriptProperty]
        [Display(Name="Strength", Order=1, GroupName="Parameters")]
        public int Strength
        { get; set; }
        #endregion

    }
}​

Thanks in advance for any inputs

[NinjaTrader_BrandonH]

Hello mazpat_3,

Thanks for your note.

The AddPlot() method would be used to add plots to a custom NinjaScript.

You may then assign a value to each of the added plots in the script so that those values plot on the chart.

AddPlot(): https://ninjatrader.com/support/help...t8/addplot.htm

To get the price of the prices from the Fibonacci Retracements drawing in the script, you could loop through the PriceLevels collection of the Fibonacci Retracements and use GetPrice(). For example, the code below may get the 50% price level of the Fibonacci Retracements drawing.

double price = 0;
foreach (PriceLevel p in fib.PriceLevels)
{
    if (p.Value == 50)
    {
         double totalPriceRange = myRetracements.EndAnchor.Price - myRetracements.StartAnchor.Price;
         price = p.GetPrice(myRetracements.StartAnchor.Price, totalPriceRange, true);
    }
}

Print(price);

Draw.FibonacciRetracements(): https://ninjatrader.com/support/help...tracements.htm
PriceLevels collection: https://ninjatrader.com/support/help...htsub=GetPrice

Please let me know if I may assist further.