A: Uptrend.
B: Support at $100.
C: Support at $250.
D: Resistance at $400.
Technical Analysis:
ISRG keeps teasing about an upside breakout, most recently, with the penetrations of resistance (D) at $400. If the uptrend (A) is broken, expect a move to support (C) at $250. If support (C) at $250 is broken, sell with an expectation of a move to support (B) at $100. If resistance (D) at $400 is broken, buy with an initial target of $550.