| | PLAT-4527: computes an indicator on a different timeframe and projects the values onto the chart bars as steps. Owned by the visible Indicator (V): a hidden shadow clone of V calculates on the MTF candle series (obtained through V's ICandlesDataProvider); this host copies the shadow's output series into V's series. V itself runs in BaseIndicator.ExternalCalculation mode. Semantics: historical chart bars take the value of the last CLOSED MTF candle (no lookahead); the last chart bar tracks the forming MTF candle until it closes. The projection is deterministic, so live values match a post-reload chart exactly.
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