Inter-Indicator DataSeries API (public access without reflection)

Custom indicators have no official way to read another indicator's DataSeries at runtime. The only workaround is reflection — iterating WPF visual trees and accessing private fields by name, which breaks on every ATAS update and is unsupported.

Request: expose a public IDataSeries GetDataSeries(string indicatorName, int seriesIndex) API (or similar) on ChartInfo so one indicator can read another's output by name. This is standard in NinjaTrader (Bars.Get(), SMA(Close, 14)[0]) and would eliminate an entire class of fragile workarounds for anyone building composite indicators or automated strategies.