if (spotRadius && options.get('minSpotColor')) {
                    x = xvalues[$.inArray(this.minyorg, yvalues)];
                    target.drawCircle(canvasLeft + Math.round((x - this.minx) * (canvasWidth / rangex)),
                        canvasTop + Math.round(canvasHeight - (canvasHeight * ((this.minyorg - this.miny) / rangey))),
                        spotRadius, undefined,