Complex sentence: The condition of the "NYSE 10 Week Moving Average is rising" may be subject to tweaking up or down 3 or 4 weeks as it role in removing noise of the weekly flux of the stock market is unclear or not well understood.
Split into simpler sentences: The condition of the "NYSE 10 Week Moving Average is rising" may be subject to tweaking up or down 3 or 4 weeks. This condition's overall role in removing noise of the weekly flux of the stock market is unclear or not well understood.