AmiBroker is a third-party charting platform in which you can build strategies through AFL. It also allows you to backtest your strategy with the help of historical data.
To use Amibroker you need market data that can be purchased from a data provider like Global Datafeeds or 1MarketView. With the help of this data, you can run live charts in AmiBroker. Based on the strategy that you implement, buy and sell signals will be generated for you. If you further wish to receive this trade signal in the Pro Web version for quick trading then you can enable the same by activating the Upstox Bridge for AmiBroker.
The signal will reflect in the AlgoLab workspace of Pro Web.
You can check out the webinar based on Bridge for AmiBroker to get an overview.