(1) real time candlestick Chart with lines and points together (2) show at least two candlesticks together

[yezhengli-Mr9]

Discussed in https://github.com/fair-acc/chart-fx/discussions/641

^{Originally posted by **yezhengli-Mr9** November 20, 2023} I can provide my sample source code if necessary in the near future. (1) Try to draw real-time candlestick Chart with lines and points together. By lines and points, I mean for example, combination of vertical and horizontal lines to show support point and alert trigger point. (1a) no need to show arrow; lines are good. (2a) even rectangles instead of combination of horizontal and vertical lines are OK. (2) better show at least two candlesticks together -- so far any way is fine: for example, (2a) side by side (2b) put two candlesticks on one chart. Try to use `addPaintAfterEp(...)` in following potentially helpful examples while following samples provide blank or non-instructive output charts? https://github.com/fair-acc/chart-fx/blob/ed86318c5a1bde23d285633a94860648aee5fb32/chartfx-samples/src/main/java/io/fair_acc/sample/financial/FinancialPositionSample.java#L45 https://github.com/fair-acc/chart-fx/blob/ed86318c5a1bde23d285633a94860648aee5fb32/chartfx-samples/src/main/java/io/fair_acc/sample/financial/FinancialRealtimeFootprintSample.java#L58   On the other hand, `addPaintAfterEp(...)` in following can provide `Color.MAGENTA` as designed https://github.com/fair-acc/chart-fx/blob/ed86318c5a1bde23d285633a94860648aee5fb32/chartfx-samples/src/main/java/io/fair_acc/sample/financial/FinancialRealtimeCandlestickSample.java#L117 

[wirew0rm]

No need to duplicate this into the issues