Sane Y-axis ticks

Chart.cs

using System;
using System.Collections.Generic;

public static class Chart
{
  public static List<double> GetChartTicks(double minValue, double maxValue)
  {
    double diff = maxValue - minValue;
    double initialValue = minValue;

    // Round to nearest for lower bound of chart:
    if (diff <= 1.0)
    {
      initialValue = Math.Floor(minValue * 10) / 10; // 0.10
    }
    else if (diff <= 5.0)
    {
      initialValue = Math.Floor(minValue); // 1.0
    }
    else if (diff <= 10.0)
    {
      initialValue = Math.Floor(minValue / 2) * 2; // 2.0
    }
    else
    {
      initialValue = Math.Floor(minValue / 5) * 5; // 5.0
    }

    // Chart tick increments.
    //KEEP THESE IN DESCENDING ORDER!!!!

    List<double> increments = new List<double> {
      500.0,
      400.0,
      300.0,
      250.0,
      200.0,
      100.0,
      80.0,
      60.0,
      50.0,
      45.0,
      40.0,
      35.0,
      30.0,
      25.0,
      20.0,
      15.0,
      10.0,
      8.0,
      5.0,
      2.5,
      2.0,
      1.0,
      0.75,
      0.5,
      0.3,
      0.25,
      0.2,
      0.15,
      0.1,
      0.05,
      0.01
    };

    int incIndex = 0;
    List<double> ticks = new List<double>();
    bool processed = false;

    // Starting with the largest increment, try to get at least six ticks
    // If we don't get at least six, move on to the next lowest increment
    while (!processed)
    {
      for (var x = 0; x < 10; x++)
      {
        if (initialValue + (increments[incIndex] * x) < maxValue)
        {
            ticks.Add(initialValue + (increments[incIndex] * x));
        }
      }
      if (ticks.Count >= 6)
      {
        processed = true;
      }
      else
      {
        incIndex++;
        ticks = new List<double>();
      }
    }
    return ticks;
  }
}