So im trying to write a simple strategy that makes a market based on bollinger bands. It's very basic so far and I have it to a point where I can offer or bid at the price I want. What im trying to do is cancel the sitting orders if price crosses the mid point of the bollingers. The strategy so far places an order based on price in relation to the 20 period ma for a bollinger. I'm either offering or bidding at the extreme bands, if price is above the 20 period ma im offering, below and im bidding. What I need to do is cancel the previous order if price doesnt fill me and moves above or below the ma. Heres the code I have so far. It will place a singal order but wont remove it and place a new one if price crosses the middle band. Any help would be greatly appreciated. I've looked at the ninjatrader help for strategies and it doesn't help me much.

protected override void Initialize()
{
Add(Bollinger(2.3, 20));
SetProfitTarget("", CalculationMode.Ticks, 21);
SetStopLoss("", CalculationMode.Ticks, 12, false);

CalculateOnBarClose = false;
}

/// <summary>
/// Called on each bar update event (incoming tick)
/// </summary>
protected override void OnBarUpdate()
{
// Condition set 1

if (GetCurrentBid() < Bollinger(2.3, 20).Middle[0])
{
entryOrder = EnterLongLimit(DefaultQuantity, Bollinger(2.3, 20).Lower[0] + -1 * TickSize, "Long");

}
if (entryOrder != null && GetCurrentBid() > Bollinger(2.3, 20).Middle[0])
{

CancelOrder(entryOrder);
}


// Condition set 2

if (GetCurrentAsk() > Bollinger(2.3, 20).Middle[0])
{
entryOrder = EnterShortLimit(DefaultQuantity, Bollinger(2.3, 20).Upper[0] + 1 * TickSize, "Short");

}
if (entryOrder != null && GetCurrentBid() < Bollinger(2.3, 20).Middle[0])
{

CancelOrder(entryOrder);
}

You need to be a little more specific on which order gets cancelled when.

Try this...

 

Code

// Bollinger_Band_Strategy #region Using declarations using System; using System.ComponentModel; using System.Diagnostics; using System.Drawing; using System.Drawing.Drawing2D; using System.Xml.Serialization; using NinjaTrader.Cbi; using NinjaTrader.Data; using NinjaTrader.Indicator; using NinjaTrader.Strategy; #endregion // This namespace holds all strategies and is required. Do not change it. namespace NinjaTrader.Strategy { /// <summary> /// Simple moving average cross over strategy. /// </summary> [Description("Bollinger Band Strategy.")] public class Bollinger_Band_Strategy : Strategy { private IOrder entryOrder = null; private double numStdDev = 2.3; private int period = 20; /// <summary> /// This method is used to configure the strategy and is called once before any strategy method is called. /// </summary> protected override void Initialize() { Add( Bollinger(numStdDev, period) ); SetProfitTarget("", CalculationMode.Ticks, 21); SetStopLoss("", CalculationMode.Ticks, 12, false); CalculateOnBarClose = false; } /// <summary> /// Called on each bar update event (incoming tick). /// </summary> protected override void OnBarUpdate() { double bollinger_upper = Bollinger(numStdDev, period).Upper[0]; double bollinger_middle = Bollinger(numStdDev, period).Middle[0]; double bollinger_lower = Bollinger(numStdDev, period).Lower[0]; if (entryOrder == null) { if (GetCurrentBid() < bollinger_middle) { double entry_price = bollinger_lower - TickSize; entryOrder = EnterLongLimit( DefaultQuantity, entry_price, "Long" ); } if (GetCurrentAsk() > bollinger_middle) { double entry_price = bollinger_upper + TickSize; entryOrder = EnterShortLimit( DefaultQuantity, entry_price, "Short" ); } } else if (Position.MarketPosition == MarketPosition.Flat) { if (GetCurrentBid() > bollinger_middle) if (entryOrder.OrderAction == OrderAction.Buy) CancelOrder(entryOrder); if (GetCurrentAsk() < bollinger_middle) if (entryOrder.OrderAction == OrderAction.Sell) CancelOrder(entryOrder); } } #region Properties [Description("Number of standard deviations")] [GridCategory("Parameters")] [Gui.Design.DisplayNameAttribute("# of std. dev.")] public double NumStdDev { get { return numStdDev; } set { numStdDev = Math.Max(0, value); } } [Description("Numbers of bars used for calculations")] [GridCategory("Parameters")] public int Period { get { return period; } set { period = Math.Max(1, value); } } #endregion } }