Hi Marco

The TrendView arrows are not buffers, they are objects on the chart. The arrow names follow this pattern: "TrendVision_Buy_" + time and "TrendVision_Sell_" + time. An EA can look for these objects on the chart and check when a new arrow appears.

Another way is using the indicator color buffer (index 3) with iCustom(). This buffer gives 0.0 for bullish trend (green) and 1.0 for bearish trend (red). To find a trend change, just compare the current buffer value with the previous one. When you use iCustom(), set “Display neutral trend lines (yellow)” = false, so you don’t get the 2.0 value (yellow) and work only with 0.0 and 1.0.

Thank you for your interest in the indicator. I’m available if you have any other questions.