Chart doesn't zoom in/out when dragging vertical (y) axis

[ttodua]

I don't know but already about one month, that after applying strategies on chart, i cant resize the Y axis:

https://app.box.com/s/mp6ck0tvn6cnhv5f2w0crkyi8xd6p6sc

it shows "F" button when I try to shrink the Y axis, but actually the chart doesnt zoom(shrink) in/out .
Are there some generic reasons/solution related to this problem?

[NinjaTrader_Jesse]

Hello ttodua,

There is nothing generic I could think of, from the video nothing sticks out as what would be the cause of that.

Do you see any errors in the log or trace files from the time since you noticed it stopped working?

The only observation I could make from the given details is that something applied to the chart or platform could have potentially affected the chart adversely causing it to fail or stop working in some way.

There are also ways to programatically control the scale, if you have items which control the scale that may be related.



I look forward to being of further assistance.

[b.j.d]

fwiw, I encountered this issue myself in the latest NT 8; somehow it appears that it occurs due to bad OnCalculateMinMax from an indicator. The workspace save file contains NaN for these ScaleMax values and even removing all the indicators from the chart does not fix this. Editing the xml, did however result in the chart being vertically scalable again.

BROKEN.xml: <FixedScaleMaxSerialize>NaN</FixedScaleMaxSerialize>
BROKEN.xml: <FixedScaleMinSerialize>NaN</FixedScaleMinSerialize>

What is strange, however is crafting a broken indicator to set MinValue or MaxValue to Double.NaN results in a console error

 Error on calling 'CalculateMinMax' method on bar 119: The calculation results in unrenderable values.

So it is not clear to me under what conditions this occurs.

Additionally, if the indicator returns Double.MinValue / MaxValue by accident, this causes the chart to go "out to lunch" presumably trying to allocate a huge drawing buffer or something.