Translate MACDStrategy by Gert Wohlgemuth (berlinguyinca), GPL-3.0, from the supplied source at commit f3340ce11f5bdf62f598522e64d1f5638eaa13f5. Use LINKUSDT.BINANCE_SPOT, long-only, 1x, 5-MINUTE bars. Preserve the MACD/CCI predicates, positive-volume guards, ROI schedule and -30% stoploss. TA-Lib defaults are MACD fastperiod=12, slowperiod=26, signalperiod=9 and CCI timeperiod=14; calculate macdhist even though it is unused. Parameter declarations specify buy_cci=-50 and sell_cci=100, but embedded buy_params=-48 and sell_params=687 are the effective baseline under default parameter loading. This precedence is documented in [Freqtrade Hyperopt](https://www.freqtrade.io/en/stable/hyperopt/). Preserve both facts; test the effective baseline first. Position sizing and market-order execution are explicit platform additions because the supplied class does not specify stake size or order types. Signal orders fill at the signal bar close, the registry's faithful equivalent to next-bar-open execution on a continuous market. Performance remains unverified. The validation repair replaces the nested minimal_roi optimization setting with four finite scalar settings without changing its schedule.