public static bool TryFindBarExactOrOneAfter(this IBars target, BarPositionDescriptor barPositionDescriptor, out int barIndex, out bool isExactMatch)
{
int firstIndex, lastIndex;
TimeStamp timeStampFound;
if (!target.TryFindTimeStampAtOrAfter(barPositionDescriptor.TimeStamp, out timeStampFound, out isExactMatch, out firstIndex, out lastIndex))
{
barIndex = -1;
return(false);
}
if (!isExactMatch)
{
barIndex = firstIndex;
return(true);
}
isExactMatch = target.TryGetIndexOfNthClose(firstIndex, lastIndex, barPositionDescriptor.Close, barPositionDescriptor.SequenceNumber, out barIndex);
if (isExactMatch)
{
return(true);
}
barIndex = Math.Min(target.Count - 1, lastIndex + 1);
return(true);
}
/// <summary>
/// Searches an IBars series to find the index of a bar exactly matching the given barPositionDescriptor, returning true if the exactly-matching bar was found.
/// If bars at the given timestamp and close do exist, but not enough to reach the barPositionDescriptor.SequenceNumber, 'barIndex' will contain the index of
/// the last bar with the right timestamp and close, even though 'false' is returned.
/// </summary>
/// <param name="barIndex">If the method returns true, barIndex is the index of the bar exactly matching the barPositionDescriptor.
/// If the method returns false, barIndex will be the index of the last bar with the correct timestamp and close, if there were not enough bars existing to match barPositionDescriptor.SequenceNumber.
/// If there were no bars with the correct timestamp and close, barIndex will be -1</param>
public static bool TryFindBarExact(this IBars target, BarPositionDescriptor barPositionDescriptor, out int barIndex)
{
barIndex = -1;
int firstIndex, lastIndex;
if (!target.TryFindTimeStampAt(barPositionDescriptor.TimeStamp, out firstIndex, out lastIndex))
{
return(false);
}
return(target.TryGetIndexOfNthClose(firstIndex, lastIndex, barPositionDescriptor.Close, barPositionDescriptor.SequenceNumber, out barIndex));
}
/// <summary>
/// Gets a BarPositionDescriptor that can be used to search for the equivalent-position bar in another IBars sequence.
/// </summary>
public static BarPositionDescriptor GetBarPositionDescriptor(this IBars target, int barIndex)
{
var result = new BarPositionDescriptor
{
TimeStamp = target.GetTimeStamp(barIndex),
Close = target.GetClose(barIndex),
SequenceNumber = 0,
};
for (barIndex--; barIndex >= 0 && target.GetTimeStamp(barIndex) == result.TimeStamp; barIndex--)
{
if (target.GetClose(barIndex) == result.Close)
{
result.SequenceNumber++;
}
}
return(result);
}
