Crosses with indicators are composed of two indicators crossing each other. These could be used to detect breakouts. For example when a shorter period indicator crosses above/below a longer period indicator to detect a bullish/bearish setup. This concept can be applied to many types of indicators such as moving averages, prices (i.e. OHLC) and oscillators.
In this example a Simple Moving Average (SMA) crossover is shown with its equivalent expression using the Strategy Designer:
Rule: SMA 20 cross above SMA 50.
The equivalent logic using the Strategy Designer can be defined as follows: