Chart Customization Horizontal Lines and Blank Fields

Alright, so I did some digging on number 2 above. Highcharts allow a break in data if the data set returns null. From the demo it looks like it had to be a lower case null as upper case wouldn't work. So the dilemma is that the field has to be a number. But has to return null if blank.


I created a formula field called Calculated_Result__c with the following formula to try to force a null value. IF(ISBLANK(Results__c),null,Results__c) but it was still recognized as 0 on the chart. Is there a snippet that can be created that tells the chart to interpret blank Result__c fields and replace them with null so the highchart will return a break in the data instead of dropping the line to 0.

More homework and I have an answer to number one but need help on the implementation. 1. TO get rid of horizontal gridlines in highcharts I need to add these two settings to the yAxis:
yAxis: {
gridLineWidth: 0,
minorGridLineWidth: 0
}
Is there a way to insert this into my code to override the existing code?

var chartObj = arguments[0], $ = skuid.$;
    
    chartObj.yAxis[0].gridLineWidth = 0;
    chartObj.yAxis[0].minorGridLineWidth = 0;