English version: Options on futures are derivatives linked to futures contracts. Trading volume and open interest reveal positioning across expiries and strikes, offering insight into market expectations, risk appetite, and potential support and resistance zones. However, they should not be treated as simple bullish or bearish signals. Today, we analyze changes in large options-on-futures trades and open interest on October 20 versus October 19. This is the latest available dataset and provides insight into positioning and risk appetite. The latest data show mixed positioning. S&P 500 front-month puts recorded the largest increase in open interest. Nasdaq puts remained dominant, while some longer-dated calls were reduced, indicating a defensive stance across equity indices. In crude oi