private List <List <double> > BollingerForRange(DateTime Start, DateTime End, int Period, double[] Multiplies)
{
//DateTime StartCorrectedForSma = Start.AddDays(-20);
List <List <double> > BollingerBands = new List <List <double> >();
double[] PriceArray;// = GetDataForRange(StartCorrectedForSma, End).Select(q => Convert.ToDouble(q.Close)).ToArray();
//get system calculated interval
int Interval = GetIntervalFromDateRange(Start, End);
int skip = 0;
if (Interval > 0)
{
//small intervalls add the desired amount of time and then skip at the end
PriceArray = GetCachedDataForRange(Start.AddSeconds(-(Interval * Period * 2)), End, Interval).Select(q => Convert.ToDouble(q.Close)).ToArray();
if (PriceArray.Length == 0)
{
return(BollingerBands);
}
skip = PriceArray.Count() - GetCachedDataForRange(Start, End, Interval).Select(q => Convert.ToDouble(q.Close)).Count();
}
else
{
int ExtendedPeriod = 0;
int AddDays = 0;
while (ExtendedPeriod <= 20)
{
AddDays++;
ExtendedPeriod = ImperaturGlobal.BusinessDaysUntil(Start.AddDays(-AddDays), Start);
}
PriceArray = GetDataForRange(Start.AddDays(-AddDays), End).Select(q => Convert.ToDouble(q.Close)).ToArray();
//double[] PriceArray2 = GetDataForRange(Start, End).Select(q => Convert.ToDouble(q.Close)).ToArray();
skip = PriceArray.Count() - GetDataForRange(Start, End).Select(q => Convert.ToDouble(q.Close)).Count();
}
//cant compute std on small amounts of data
if (PriceArray.Count() < 2)
{
return(BollingerBands);
}
double[] CenterLine = Statistics.MovingAverage(
PriceArray
, Period).ToArray();
double[] CenterLine2 = MymMoving(PriceArray, Period);
double[] StandardDevation = GetStandardDeviationPointsOfCenterLine2(PriceArray, Period);
BollingerBands.Add(CenterLine.Skip(skip).ToList());
for (int i = 0; i < Multiplies.Length; i++)
{
BollingerBands.Add(GetExtendedBandOfCenterLine(CenterLine, StandardDevation.ToArray(), Multiplies[i], true).Skip(skip).ToList());
BollingerBands.Add(GetExtendedBandOfCenterLine(CenterLine, StandardDevation.ToArray(), Multiplies[i], false).Skip(skip).ToList());
}
return(BollingerBands);
}
private void PriceList_ItemSelected(object sender, SelectedItemChangedEventArgs e)
{
Change.IsVisible = !Confirm.IsVisible;
string name = PriceList.SelectedItem.ToString();
if (changer)
{
for (int x = 0; x < PriceArray.Length; x++)
{
if (PriceArray.Cast <string>().ToList().ElementAt(x) == name)
{
select2 = x;
minDiam.Text = ((List <PriceRange>)Application.Current.Properties["Prices"]).ElementAt(pickPrice.SelectedIndex).GetBrack().ElementAt(x).Key.ToString();
price.Text = ((List <PriceRange>)Application.Current.Properties["Prices"]).ElementAt(pickPrice.SelectedIndex).GetBrack().ElementAt(x).Value.ToString();
try { maxDiam.Text = ((List <PriceRange>)Application.Current.Properties["Prices"]).ElementAt(pickPrice.SelectedIndex).GetBrack().ElementAt(x + 1).Key.ToString(); }
catch { maxDiam.Text = null; }
}
}
}
}
private async Task Change_Clicked(EventArgs e)
{
string name = PriceList.SelectedItem.ToString();
for (int x = 0; x < PriceArray.Length; x++)
{
if (PriceArray.Cast <string>().ToList().ElementAt(x) == name)
{
select2 = x;
}
}
MessagingCenter.Subscribe <ChangePrice>(this, "Change", async(sender) => {
PopList(pickPrice.SelectedIndex);
Pricetitle.Text = AppResource.ResourceManager.GetResourceSet(Thread.CurrentThread.CurrentCulture, true, true).GetString("Pricings") + " :" + AppResource.ResourceManager.GetResourceSet(Thread.CurrentThread.CurrentCulture, true, true).GetString("Saved");
SaveAll.GetInstance().SavePricing();
await Task.Delay(5000);
Pricetitle.Text = AppResource.ResourceManager.GetResourceSet(Thread.CurrentThread.CurrentCulture, true, true).GetString("Pricings");
});
Application.Current.Properties["Priceholder"] = (pickPrice.SelectedIndex, select2);
await PopupNavigation.Instance.PushAsync(ChangePrice.GetInstance());
}
