tradex-app / tradex-chart Goto Github PK

Modify active Overlay / Indicator parameters via API

Add API and GUI option to modify chart config.

API will include an options to

• override the default GUI config.
• submit callback

Allowed Config will be a list of config options that the end user will be allowed to modify. Each list entry will have the following:

• config option pointer
• label
• form input element type
• description
• single line or block
• form element onChange event subscription

When a TradeX element is added to the DOM, automatically start() it with the default config.
When the user / dev executes start(config), execute a config merge instead.

The vertical sizing of the volume does not adjust correctly in full screen mode.

Every Overlay and Indicator has a set of parameters for it's instantiation.
An optional additional parameter publicParams will be added to define which instance parameters should / could be exposed to the end user via the configuration (cog) icon, or other defined by the developer, exposing the config API.

The inbuilt / default configuration invocation will open a dialogue in the chart GUI, which will expose only the parameters defined by publicParams.

Similarly, custom defined configuration invocation will also only expose those defined by publicParams

Using the following feature:
Modify Overlay / Indicator Parameters
#48
would allow for the dynamic modification of what parameters are exposed to the end user.

Enable hot swapping of chart data states, which would be useful for changing time frames
Flag to copy drawing tools between state changes
Ensure that chart refreshes / redraws / updates after state change

Currently the chart is only a stock / crypto asset chart. However, the existing functionality used to draw this, could, with also be repurposed so that the same chart library could also display simpler charts / graphs such as equity, thereby reducing the need to use other chart / graph libraries in the Dash2Trade application and the need to build templates specific to them.

Refactor Volume as an indicator
with option to display on Primary Pane or as a Secondary Pane

When attempting to scroll to the right (future) and the last candle/s are on the left edge of the chart, the chart jitters or shudders.

Chart should not scroll at all, seamlessly allow the chart to scroll into blank future history.

Needs to work with future history boundary.

Currently the Price Scale / Y Axis is of fixed width. Although this is a fixed width, it is configurable in the chart. This should however automatically resize to size / length of the numbers displayed on this axis.
Further, this axis should optionally provide abbreviations for longer numbers if a flag is set.
100,000.00 => 100K

The accuracy of clicking on (trade) icons or regions of the chart can be improved. Currently hit detection and positioning is calculated, and owing to rounding errors, the positioning of the hit region in some instances is off to the side of the marker. However there is a pixel perfect hit detection that I have researched which can be implemented which would improve the user experience. It relies upon pixel detection rather than calculations and thus, not prone to the aforementioned errors. The method is efficient, and so does not impact upon the chart / browser performance (speed). Here are some examples.

https://codesandbox.io/s/canvas-hit-detection-l77nlq
https://codesandbox.io/s/canvas-extension-layers-hm8hlv

Implementing this would also allow for more advanced features to be built into the chart if and when required, for instance (PnL) measuring or drawing tools.

Scale / Y-Axis - Mouse Wheel - manual Y-Axis scaling / zooming is slow.
Increase the step size.

Hot swapping of themes - multi-theme support
Swap out entire chart theme after instantiation
Enable the chart to hold multiple themes in memory

Chart does not automatically redraw (remove from / clean up the display) indicators when removing them using the chart API. The chart however does redraw / update correctly upon any mouse / pointer interaction over the chart. It appears a call to the clean up method is missing.

Volume Almost Disappears in Full Screen Mode

Timeline also disappears.

Adding custom indicators on 0.140.2 is not possible anymore, was working up until 0.139.9