dollar cost averaging gold

Gold seems to be on a monthly cycle. It seems to climb for around 30 days then drop precipitously. I’ve been buying on the down cycle and dollar cost averaging. What causes the dips is a matter for conjecture. I’ve heard that options come due at these times. I’ve also thought that the Fed sells off its gold on these cycles to make the dollar appear less deathly ill than it is. Who knows? But for whatever reason it does seem to be following a pattern. Has anyone else noticed this? Does anyone have any explanations?