/// <summary>
/// 计算涨跌速度，计算好的速度设置在ChangeSpeed属性上。
/// 对下跌幅度计算方法进行了更改: 假设s为开始值，e为结束值，原本算法为 (e-s)/s*100%，修改后算法为 (s-e)/e*100%。
/// 目的: 修正原本算法下涨幅、跌幅的不公平性，例如经历涨幅100%再经历跌幅50%，已经回到原价，这样相同的涨跌幅就不具备比较性
/// </summary>
/// <param name="k">K线数据</param>
public static void CalChangeSpeed(KTrend trend)
{
if (trend.TxDays <= 1 || trend.StartValue==0)
return;
int dr = trend.StartValue < trend.EndValue ? 1 : -1;
decimal lo = trend.StartValue < trend.EndValue ? trend.StartValue : trend.EndValue;
decimal hi = trend.EndValue > trend.StartValue ? trend.EndValue : trend.StartValue;
trend.ChangeSpeed = Convert.ToDecimal(Math.Pow(Convert.ToDouble(hi / lo), Convert.ToDouble(1.0 / (trend.TxDays - 1))) - 1) * 100 * dr;
}
public KTrendMALong(KTrend trend)
{
this.Id = 0;
this.StockId = trend.StockId;
this.StartDate = trend.StartDate;
this.StartValue = trend.StartValue;
this.EndDate = trend.EndDate;
this.EndValue = trend.EndValue;
this.TxDays = trend.TxDays;
this.ChangeSpeed = trend.ChangeSpeed;
}
/// <summary>
/// 计算区间最大值、最小值、振幅，计算好的结果直接设置在trend上
/// </summary>
/// <param name="trend">Trend.</param>
/// <param name="lk">Lk.</param>
/// <param name="start">Start.</param>
/// <param name="end">End.</param>
public static void CalHighLowValue(KTrend trend, MAType type, IList<KJapaneseData> lk, int start, int end)
{
decimal hi = trend.StartValue, lo = trend.StartValue;
for (int i = start + 1; i <= end; i++){
decimal v = 0;
switch (type){
case MAType.MAShort:
case MAType.MALong:
v = lk[i].ClosePrice;
break;
case MAType.VMAShort:
case MAType.VMALong:
v = lk[i].Volume;
break;
}
if (lk[i].ClosePrice > hi)
hi = lk[i].ClosePrice;
if (lk[i].ClosePrice < lo)
lo = lk[i].ClosePrice;
}
trend.HighValue = hi;
trend.LowValue = lo;
trend.Amplitude = CalNetChange(lo, hi);
}