The price of gold can fall for various reasons, and the specific causes of today's decline may include several factors:
Rising U.S. Dollar (DXY): Since gold is priced in U.S. dollars, a stronger dollar makes gold more expensive for investors using other currencies, reducing demand. If the DXY (U.S. Dollar Index) is rising today, it can put downward pressure on...
XAU has a POSSIBLE move downtrend, careful with XAU positionings since XAU has violent moves.
In that case remember you can trade XAG instead.
Keep in mind prices have a huge impact depending on the instrument you trade with.