Javascript

<html>

<style>

body {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.x.axis path {
  display: none;
}

.area.above {
  fill: rgb(252,141,89);
}

.area.below {
  fill: rgb(145,207,96);
}

.line {
  fill: none;
  stroke: #000;
  stroke-width: 1.5px;
}

</style>
<body>
<script src="d3.v3.min.js"></script>

<script>

var format = d3.time.format("%Y-%m-%d");

var margin = {top: 20, right: 20, bottom: 30, left: 50},
    width  = 960 - margin.left - margin.right,
    height  = 500 - margin.top - margin.bottom;

var xstream  = d3.time.scale()
    .range([0, width]);

var ystream = d3.scale.linear()
    .range([height, 0]);

var xAxisstream = d3.svg.axis()
    .scale(xstream)
    .orient("bottom");

var yAxisstream = d3.svg.axis()
    .scale(ystream)
    .orient("left");

var linestream = d3.svg.area()
    .interpolate("basis")
.x(function(dstream) { return xstream(dstream["unixtime"]); })
    .y(function(dstream) { return ystream(dstream["stream"]); });

var areastream = d3.svg.area()
    .interpolate("basis")
    .x(function(dstream) { return xstream(dstream["unixtime"]); })
    .y1(function(dstream) { return ystream(dstream["stream"]); });

var svgstream = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

d3.csv("streamvalues.csv", function(errorstream, datastream) {
  datastream.forEach(function(dstream) {
    dstream["unixtime"] = format(new Date(dstream["unixtime"]));
    dstream["stream"]= +dstream["stream"];
    dstream["stream-7.5%"]= +dstream["stream"] * .925;
    dstream["stream+7.5%"]= +dstream["stream"] * .1075;
  });

  xstream.domain(d3.extent(datastream, function(dstream) { return dstream["unixtime"] }));

  ystream.domain([
    d3.min(datastream, function(dstream) { return dstream["stream-7.5%"]  }),
    d3.max(datastream, function(dstream) { return dstream["stream+7.5%"] }),
  ]);

  svgstream.datum(datastream);

  svgstream.append("clipPath")
      .attr("id", "clip-below")
    .append("path")
.attr("dstream", areastream.y0(height));

  svgstream.append("clipPath")
      .attr("id", "clip-above")
    .append("path")
      .attr("dstream", areastream.y0(0));

  svgstream.append("path")
      .attr("class", "area above")
      .attr("clip-path", "url(#clip-above)")
      .attr("dstream", areastream.y0(function(dstream) { return ystream(dstream["stream-7.5%"]); }));

  svgstream.append("path")
      .attr("class", "area below")
      .attr("clip-path", "url(#clip-below)")
      .attr("dstream", areastream);

  svgstream.append("path")
      .attr("class", "line")
      .attr("dstream", linestream);

  svgstream.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxisstream);

  svgstream.append("g")
      .attr("class", "y axis")
      .call(yAxisstream)
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("ystream", 6)
      .attr("dystream", ".71em")
      .style("text-anchor", "end")
      .text("Mbps");
});
</script>
</body>
</html>