$NVIDIA(NVDA.US) opened lower today, experienced slight fluctuations, and then pulled up, but the strength and extent of the rise were limited. The bull-bear demarcation point for $Sandisk(SNDK.US) today is 6880. After filling the gap from the lower opening, it fell back, fluctuating and trending lower during the session. The intraday volatility was relatively high today, predicted at 75-85 points. It closed in the green at the end of the session, with the daily K-line forming a solid bearish candle. The suggested operation is to short on rallies. SPX's high today is 6879, limit 6891; low is 6832, limit 6812. A small lesson on stock market trends for $Tesla(TSLA.US).