This weekly commodity report analyzes the performance and trading strategies for gold, silver, crude oil, and copper from April 17 to April 21, 2017, highlighting geopolitical tensions as a driving factor for price movements. Recommendations include selling gold below 28900 and buying near 29200, while for silver, selling below 41800 and buying above 42700 is suggested. The report emphasizes the importance of individual research for investment decisions and includes disclaimers about the reliability of the information provided.