public static void UpdateHistoryItem(ITicker item)
{
TickerHistoryItem last = item.History.Count == 0 ? null : item.History.Last();
if (item.History.Count > 36000)
{
item.History.RemoveAt(0);
}
if (last != null)
{
if (last.Ask == item.LowestAsk && last.Bid == item.HighestBid && last.Current == item.Last)
{
return;
}
item.Change = ((item.Last - last.Current) / last.Current) * 100;
if (last.Bid != item.HighestBid)
{
item.BidChange = (item.HighestBid - last.Bid) * 100;
}
if (last.Ask != item.LowestAsk)
{
item.AskChange = item.LowestAsk - last.Ask;
}
}
item.History.Add(new TickerHistoryItem()
{
Time = item.Time, Ask = item.LowestAsk, Bid = item.HighestBid, Current = item.Last
});
item.RaiseHistoryItemAdded();
}