Please explain how OnBarUpdate related to Plot method

[maxima]

I have a chart. Set at 1 tick. Line on close.

There are 2-3 prints in T&S screen in between chart drwaings.

I printed Close[0] price from OnBarUpdate and from Plot.

It seems to me that NT calls:

1. Plot every time 'chart tick' has been drawn.
2. OnBarUpdate everytime T&S prints.

Can anyone please confirm these ?

Also is there any chance to make Plot to be called for each actual market tick if chart size is 1 tick... I am confused how come tick chart displays 2,3,4 ticks?

The problem with that - on Plot I cant get previous price correct. I get price change on next Plot all the time.

[FONT=Courier New][SIZE=2][COLOR=#0000ff][FONT=Courier New][SIZE=2][COLOR=#0000ff][FONT=Courier New][SIZE=2][COLOR=#0000ff][FONT=Courier New][SIZE=2][FONT=Courier New][/FONT][/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff][FONT=Courier New][SIZE=2][COLOR=#0000ff][FONT=Courier New][SIZE=2][COLOR=#0000ff]int[/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2][FONT=Courier New][SIZE=2] currTicks = Convert.ToInt32([/SIZE][/FONT][/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff][FONT=Courier New][SIZE=2][COLOR=#0000ff][FONT=Courier New][SIZE=2][COLOR=#0000ff]decimal[/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2][FONT=Courier New][SIZE=2].Truncate(Convert.ToDecimal(Close[[/SIZE][/FONT][/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080][FONT=Courier New][SIZE=2][COLOR=#800080][FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2][FONT=Courier New][SIZE=2]] / TickSize)));

[/SIZE][/FONT][/SIZE][/FONT][FONT=Courier New][SIZE=2][FONT=Courier New][SIZE=2]Print([/SIZE][/FONT][/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff][FONT=Courier New][SIZE=2][COLOR=#0000ff][FONT=Courier New][SIZE=2][COLOR=#0000ff]string[/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2][FONT=Courier New][SIZE=2].Format([/SIZE][/FONT][/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800000][FONT=Courier New][SIZE=2][COLOR=#800000][FONT=Courier New][SIZE=2][COLOR=#800000]"Prev {0} Curr {1}"[/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2][FONT=Courier New][SIZE=2], prevTicks, currTicks));
prevTicks = currTicks;
[/SIZE][/FONT][/SIZE][/FONT][/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2][FONT=Courier New][/FONT][/SIZE][/FONT]

I have for example price on the chart 1 1 2 2 and in Plot O have price - 1 1 1 2.

Price in Plot is lagging behind!

Question:

How can I get correct price in Plot method ?

Or

Can I draw my custom GDI+ things in OnBarUpdate?

[NinjaTrader_JoshP]

Hi maxima,

This is attributed to asynchronous multi-thread. There is no guarantee the Plot method will fire in sequential fashion to the OnBarUpdate(). OnBarUpdate() is triggered every time a bar is updated (or incoming tick). The Plot() method is called when the indicator is plotting. I suggest you just run your logic in OnBarUpdate() and just access them from the Plot() method.

[maxima]

Sorry Josh. Actually I was wrong and my question is misleading. I understand that you cannot guarantee sequence because of async threads.

My real question has to be:

Why OnBarUpdate/Plot events fire once per 2-5 OnMarketData event?

Or in simple words - why tick chart is 2-5 times slower than actual ticks speed?

How can I make it actual 1:1 tick chart?

The answer will be really appreciated.

[NinjaTrader_Ray]

You can set the chart update interval to a value of zero which should update the visuals on each incoming tick instead of timer based. However...I don't recall, there may still be some internal optimization logic.

[maxima]

Thanks. It seems there is no way to do so in NT UI (I tried 0 in "Display update interval").

I made my own form and draw every tick there. My CPU at abt 3% (Q9300 quad) loaded. There is no problem to have tick charts as some people may want to do scalping you know .

I think NT have to provide raw tick charts in ver 7. There is no reason not to

[NinjaTrader_JoshP]

Thanks for the suggestion. We will put it on the list of future considerations.

[NinjaTrader_Ray]

Just open a chart, set to 1 tick and use line on close and you will have a raw tick chart.