Multichartz

[goodboy]

The UI follow up to #414.

Hopefully this is the final core-UX feature you always wanted 🏄🏼

mult-instrument overlayed real-time and historical data feeds with simultaneous interaction and "current symbol" selectable order mode control

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THE CMD YOU NEED:

piker chart btcusdt.binance ethusdt.binance xmrusdt.binance

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First draft TODO

There are still tons of refinements and bugs to fix as part of this first draft

Init basic funtionality / usage:

• [x] basic initial usage is to start a chart with multiple input symbols: piker chart btcusdt.binance ethusdt.binance xmrusdt.binance
• [ ] dynamic managment of symbols per chart view (i.e. overlayed symbols can be added/removed from a running LinkedSplits
• [ ] more or less the idea of the currently selected symbol state as described in sub-sections below
  • [ ] select by y-axis
  • [ ] select by double click on curve?
  • [ ] select by hot key (some kinda tab or space global hotkey?)
• [ ] loading and saving of watchlists by name which contain multiple fqsns

Fast view

• [ ] selected feed should be closest to curve?
• [x] L1 labels can be simplified
  • [ ] place them all x-offset to the inner most y-axis?
  • [ ] only show (humanized) size on bid/ask not price?
• [ ] draw little line from each last label to curve?
• [ ] some kind of label system to easily know which curve is which feed?
  • [ ] last label should include fqsn?
  • [ ] each y-axis should have fqsn?
• [ ] for cross-brokerd symbols should we use a single axis?
  • [ ] how to determine this automatically? Do a in the same range calc?
• [ ] how should last datum graphics be offset, eg. should they be in reverse order of the y-axis from left-to-right?

History view

• [x] curves need to be epoch time aligned instead shm index aligned since obviously it will result in non-time aligned data sets as it is now using the 'index' basis..
• [x] fix pg.LinearRegion item to show all background overlay curves transparently

Graphics loop

• [ ] use single Feed.open_multi_steam() for the update task and have it look up appropriate graphics update apis per symbol-quote
• [ ] refactor a bunch of the charting/graphics apis to mostly to remove the global-ish ChartPlotWidget instance and API calls, instead moving all this state into Flow / Flume items and possibly add a Viz type to replace the Flow and instead make the Flow a table of associated src data -> procesor pipelines?
  • more to write up as individual subtasks here

Search UI/UX

• [ ] make search results and caching work with multi-symbol selections by the GodWidget
• [ ] all selected symbols should be shown in fqsn form in the window title bar
  • [ ] what about the symbol meta-data we used to have? -> maybe just put it in the feed label in the sidepane?
• [ ] allow switching between single-symbol selection
• [ ] add support for multichart "feed groups" using the existing results tree view UI
  • [ ] adding and removing items from a overlay group
  • [ ] context menu options to add/remove symbols from a group
  • [ ] mouse UX (shift-click-drag-release?) to create a group from a single/flat results tree?
  • [ ] hot keys for adding a new search result to a group instead of a new widget set (maybe ctl-o or ctl-enter on result row?)
• [ ] add a "selected sub-symbol" UX where whatever highlighted symbol is in the results view changes the state of the "currently active contract":
  • [ ] highlight the feed's graphics curves and y-axis vs. the other overlays
  • [ ] activate order mode control for that symbol
  • [ ] show feed meta-data in sidepane label for selected

FSP (subcharts)

• [ ] should fsps like vlm which require a subchart be overlayed or only the currently selected shown by default?
  • we can make this configurable and maybe offer a sidepane drop down showing all combos and/or a toggle set of symbols from the overlay set?
• [ ] for ohlc main chart overlays how should we do coloring?

Order mode

• [ ] allow passing a fqsns: list[str] to open_order_mode() and having this setup the client loop and the ems tasks to use feed.open_feed() with the same fqsns passed through?
• [ ] pp line arrow-marker should sit on the specific y-axis?
• [ ] depending on "selected symbol" only show that pp?
• [ ] show active order summary markers (for those not in view) on each sub-yaxis
• [ ] support submitting orders per symbol this is currently mega borked
• [ ] how/when to show all pps?

[goodboy]

This is going to get closed as it was replaced by a sequence of 7 (or so) smaller PRs ending with #455.

Also going to make a follow issue which will include the bullet set above rewritten and checked off as we finish follow up refinement tasks.

[goodboy]

Replaced by the slew of PRs and follow up (copy pasted from here to start) task set in #461.