helps to add the file.

candlestick_series.go

@@ -0,0 +1,75 @@
+package chart
+
+import (
+	"fmt"
+	"time"
+)
+
+type CandleValue struct {
+	Timestamp time.Time
+	High      float64
+	Low       float64
+	Open      float64
+	Close     float64
+}
+
+// CandlestickSeries is a special type of series that takes a norma value provider
+// and maps it to day value stats (high, low, open, close).
+type CandlestickSeries struct {
+	Name        string
+	Style       Style
+	YAxis       YAxisType
+	InnerSeries ValuesProvider
+}
+
+// GetName implements Series.GetName.
+func (cs CandlestickSeries) GetName() string {
+	return cs.Name
+}
+
+// GetStyle implements Series.GetStyle.
+func (cs CandlestickSeries) GetStyle() Style {
+	return cs.Style
+}
+
+// GetYAxis returns which yaxis the series is mapped to.
+func (cs CandlestickSeries) GetYAxis() YAxisType {
+	return cs.YAxis
+}
+
+// CandleValues returns the candlestick values for each day represented by the inner series.
+func (cs CandlestickSeries) CandleValues() []CandleValue {
+	// for each "day" represented by the inner series
+	// compute the open (i.e. the first value at or near market open)
+	// compute the close (i.e. the last value at or near market close)
+	// compute the high, or the max
+	// compute the low, or the min
+
+	totalValues := cs.InnerSeries.Len()
+
+	var values []CandleValue
+
+	var day int
+	for i := 0; i < totalValues; i++ {
+		if day == 0 {
+			// extract day value from time value
+		}
+		if 
+	}
+
+	return values
+}
+
+// Render implements Series.Render.
+func (cs CandlestickSeries) Render(r Renderer, canvasBox Box, xrange, yrange Range, defaults Style) {
+	//style := cs.Style.InheritFrom(defaults)
+	//Draw.CandlestickSeries(r, canvasBox, xrange, yrange, style, cs)
+}
+
+// Validate validates the series.
+func (cs CandlestickSeries) Validate() error {
+	if cs.InnerSeries == nil {
+		return fmt.Errorf("histogram series requires InnerSeries to be set")
+	}
+	return nil
+}