The main difference between an indicator and a strategy on TradingView is as follows:
Indicator: These are tools that visually assist by analyzing price, volume, or other market data. They can generate buy and sell signals but do not perform automatic backtesting on historical data.
Strategy: A system that simulates trading based on specific buy and sell rules and can test its performance on historical data. Thanks to backtesting, the profitability of the strategy can be measured.
In short, indicators are used for analysis, while strategies are used for testing and automation. Neither can send orders directly to brokers through TradingView.