I added a new option in the "Advanced Options" to select earning dates to ignore : the selected earning dates will appear in the charts but in dotted lines, won't be taken in the average calculation and won't be taken into account when calculating the 'zoom' of the chart. I don't have a better way to deal with this.
It will work for Straddle and Calendar RV pages.
Here is an example with NVDA with the 2017-02-09 earning cycle ignored :
Here is an example with BKNG with the 2016-08-04 cycle removed :