OnBarUpdate not called for indicator within Stragety

August 10th, 2013, 11:49 AM

Hi,

I am playing with the priceactionswing indicator, and am running into a big problem - within my strategy, the PAS OnBarUpdate method is never called! I cant find anything relating to specific instructions on how to include an indicator within a strategy, so I simply created the indicator within the Initialise function of my strategy.

However the PAS OnBarUpdate is never called (verified with a print statement) and the structures within the object are never populated. Init and OnStartUp are called.

Is there an obvious step I am missing to link the embedded indicator to the data series of the strategy? I am an experienced programmer but very new to the NT universe, so I am not clear on how the OnBarUpdate event works and how to allow the indicator to subscribe to this event.

Code

 protected override void Initialize()
        {
            CalculateOnBarClose = true;
	    pas = PriceActionSwing(Input, _dtbStrength, _swingSize, SwingTypes.Standard);

        }
		
		protected override void OnStartUp()
		{
			
		}

        /// <summary>
        /// Called on each bar update event (incoming tick)
        /// </summary>
        protected override void OnBarUpdate()
        {
			Print (++_cnt);
                        // reference pas object contents

August 13th, 2013, 01:56 AM

corbeste

Hi,

I am playing with the priceactionswing indicator, and am running into a big problem - within my strategy, the PAS OnBarUpdate method is never called! I cant find anything relating to specific instructions on how to include an indicator within a strategy, so I simply created the indicator within the Initialise function of my strategy.

However the PAS OnBarUpdate is never called (verified with a print statement) and the structures within the object are never populated. Init and OnStartUp are called.

Is there an obvious step I am missing to link the embedded indicator to the data series of the strategy? I am an experienced programmer but very new to the NT universe, so I am not clear on how the OnBarUpdate event works and how to allow the indicator to subscribe to this event.

Code

 protected override void Initialize()
        {
            CalculateOnBarClose = true;
	    pas = PriceActionSwing(Input, _dtbStrength, _swingSize, SwingTypes.Standard);

        }
		
		protected override void OnStartUp()
		{
			
		}

        /// <summary>
        /// Called on each bar update event (incoming tick)
        /// </summary>
        protected override void OnBarUpdate()
        {
			Print (++_cnt);
                        // reference pas object contents

I think your problem is that Initalize is only called once. You probably want to add the indicator to your plot using the Add method from Initialize then set pas from OnBarUpdate.

protected override void Initialize()
{
Add(PriceActionSwing( ...) );

}

protected override void OnBarUpdate()
{
pas = PriceActionSwing( ... );

...
}

Note: make sure that the arguments for the PriceActionSwing calls are precisely the same in both cases.

OnBarUpdate not called for indicator within Stragety

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OnBarUpdate not called for indicator within Stragety