Bar no smoothing line

[sunworshipper]

Is there a way to look at the data without smoothing? i.e. you see a histogram like view with the actual data at each base?

[MatSchaeff]

There is actually a hidden parameter for the line feature, I should add it to the doc. I originately used it to compare different styles before selecting the actual way of displaying it. You can choose the type of line with the "interpolation" option when adding the feature.
And you can find the different types of D3 interpolation here :
https://coderwall.com/p/thtwbw/d3-js-interpolation-options
Example :

ft3.addFeature({
    data: data,
    name: "test feature",
    color: "#667580",
    type: "line",
    height:"5",
    interpolation:"step-before"
});