feat: add pandas_to_ohlc() for OHLC DataFrame conversion (closes #15)#34
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pandas_to_ohlc(df, low_col, high_col, close_col) converts any OHLC pandas DataFrame (yfinance, ccxt, or custom column names) to the (low, high) tuple expected by calc_support_resistance, get_extrema, and the plot functions. Column names are auto-detected case-insensitively when not specified. Pass df.index as idx to plot_sup_res_date for date-formatted x-axis labels.
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pandas_to_ohlc(df, low_col, high_col, close_col) converts any OHLC pandas DataFrame (yfinance, ccxt, or custom column names) to the (low, high) tuple expected by calc_support_resistance, get_extrema, and the plot functions. Column names are auto-detected case-insensitively when not specified. Pass df.index as idx to plot_sup_res_date for date-formatted x-axis labels.