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A group of functions intended for access to price data of any available
symbol/period.
利用可能な通貨ペアや期間の価格データへのアクセスを目的とした関数のグループです。
If data (symbol name and/or timeframe differ from the current ones) are
requested from another chart, the situation is possible that the corresponding
chart was not opened in the client terminal and the necessary data must
be requested from the server. In this case, error ERR_HISTORY_WILL_UPDATED (4066 - the requested history data are under
updating) will be placed in the last_error variable, and one will has to re-request (see example of ArrayCopySeries()).
At the testing, price data of the same symbol but of another timeframe
are modelled exactly, with the exception of volumes. Volumes of another
timeframe are not modelled. Price data of other symbols are not modelled,
either. In all cases, the amount of bars in time series is modelled exactly.
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