Please check: https://jsfiddle.net/quLow2kp/
Here, I have put the dummy column and dummy scatter points along with candlestick data.
I have set column to after 6 months after last epoch fo candlestick data.
I have set two scatter points. One in middle of timeline and on at the same epoch as of column chart (which is after 6 months of candlestick data).
I have also set xaxis.ordinal to true.
So, I expect that all the scatter point should be visible, as x axis is ordinal.
But That is not the case. Only first scatter which is in middle of timeline is only visible.
But, column is visible.
Why column is visible but not second scatter point besides both are on same eppoch?