public override void Plot VS multiple dataseries

November 2nd, 2013, 01:44 PM

Hi every1,

If some1 could help, would be much appreciated
I've written a few indicators using "public override void Plot"
... like many you'll found in the futures.io (formerly BMT) download section

My problem is that when I call 2 dataseries on the same chart of NT, the "drawing" part of the indicator freeze on the chart and, moving my scrollbar right or left have totally no effect on it... but I see everrything else moving ....

See pic attached ot try to make myself clearer... in this exemple, I redraw the candles over those of NT ... but totally frozen on the chart when I insert a second dataserie for the 5 min candles.

I guess NT dont like the "public" part of "public override void Plot", and "private" does not work ...

Thanks

November 3rd, 2013, 08:08 AM

It should not be any issue with 'public' - more likely the code in the Plot method is not actually doing what you expect (e.g. lock up in the 'while' statement, or not using bar offsets correctly, or attaching to the wrong data series?. Given the glimpse of ChartControl I assume you are using direct draw graphics for a specific overlay requirement which require a full redraw on every call, otherwise could you simplify the indicator to just use Ninja Draw methods?

Without seeing more of the code it is hard to suggest much else, except maybe never underestimate the usefulness of simple 'Print' calls with the Ninja Output Window opened up, frequently overlooked and often still the best spanner in the box.

November 3rd, 2013, 04:00 PM

Thank you for your reply Ratfink

If you want to give it a try, here's a little indicator with the same kind of bug that use the

"public override void Plot(Graphics graphics, Rectangle bounds, double min, double max)"

It's a simple stochastic indicator that fills the space between the K and the D ... color is different if K > D or D > k ...

Everything work fine until you insert a second dataserie in the chart

Thanks

ratfink

It should not be any issue with 'public' - more likely the code in the Plot method is not actually doing what you expect (e.g. lock up in the 'while' statement, or not using bar offsets correctly, or attaching to the wrong data series?. Given the glimpse of ChartControl I assume you are using direct draw graphics for a specific overlay requirement which require a full redraw on every call, otherwise could you simplify the indicator to just use Ninja Draw methods?

Without seeing more of the code it is hard to suggest much else, except maybe never underestimate the usefulness of simple 'Print' calls with the Ninja Output Window opened up, frequently overlooked and often still the best spanner in the box.

November 3rd, 2013, 04:23 PM

Hi,

I'm not able to test anything now, but it should be ok if you just add:

Code

if (BarsInProgress != 0)
    return;

at the beginning of the Plot method (and for most also in OnBarUpdate), that will stop the second (or more) data series getting involved.

Cheers

November 3rd, 2013, 05:00 PM

I tried without success ...
Thanks anyway for your help !
Lio

ratfink

Hi,

I'm not able to test anything now, but it should be ok if you just add:

Code

if (BarsInProgress != 0)
    return;

at the beginning of the Plot method (and for most also in OnBarUpdate), that will stop the second (or more) data series getting involved.

Cheers

November 3rd, 2013, 05:15 PM

AkLio

I tried without success ...
Thanks anyway for your help !
Lio

Yes, sorry, was just turning in for sleep and realised what I posted is for multi-instrument series using the 'Add()' method and not multi-dataseries added from the GUI, I will have a look when I can test tomorrow unless one of the other serious C#'ers solves it before then.

public override void Plot VS multiple dataseries

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public override void Plot VS multiple dataseries