Today's price-action in ATVI was similar to the Boeing last week (Jul 19th), which was one-week before its earning.
Trend(OBV) uses True Strength Index to analyze "On-Balance-Volume", which measures buying and selling pressure as a cumulative indicator.
Horizontal lines and zones are supports (entry for bulls and exit for bears) and resistances (exits for bulls and entries for bears). Diagonal lines from Fib fans are for trend-determination and additional levels for active trading. The market is actively moving so the entries and exits for this type of meme stocks constantly change. Trade small if you want to practice!