理查德·唐奇安 (Richard Donchian) 设计的这个简单系统真的有效吗？ (Does this simple system by Richard Donch)

The 4 Week Rule
The 4 week trading rule system has been at the
heart of many successful trading systems and is
one of the simplest, easiest and most profitable
ways to trade trending markets.
The Rules
The original rules were used for trading
commodities and can be summarized by:
1) Close short positions and go long whenever the price exceeds the highs of the previous 4
calendar weeks.
2) Close long positions and go short whenever the price falls below the lows of the previous 4
calendar weeks.
If run with a SAR (stop and reverse), the above system will always maintain a position in the
market (either long or short).

Filter : 5SMA, Apply for Open and 5 SMA Apply for Close

@ Entry 2PO, SL > 5 SMA line SELL and above 5 SMA line BUY, TP1 = SL/Risk and TP 2 the new 2 week low for short entry and 2 new week high for Long.....

This simple system can working for all trading?????
Please provide your feedback about this system that is packed with as simple and could also with these simple systems can be run and managed well in trading currencies today, give your feedback and your opinion in a forum to exchange opinions. before and after I thank you,