High-Frequency ATR

Query intraday minute-bar ATR (Average True Range) for A-share securities via the market data service.TR = max(H-L, |H-Cp|, |L-Cp|); ATR = MA(TR, N).Default: N=14.line selects output: 'TR' (True Range) or 'ATR' (Average True Range).codes: comma-separated security codes (e.g. '600000.SH,000001.SZ').interval: minute bar width — 1/3/5/10/15/30/60.starttime/endtime: 'YYYY-MM-DD HH: MM: SS' intraday range.