Green dot = Trending down. Purple dot = Trending up. Fuchsia dot = Uptrend ended. Lime dot = Downtrend ended. Fuchsia line = The highest value of the last trend (breaking it up means continuation. Lime line = Idem fuchsia line but to the downside. Blue crosses = Could be different things: 1. A dip to buy, 2. A rally to sell, 3. Building a range ... Blue range = Depending on the direction it breaks, is the next direction. Golden line = Candles above favour uptrends, Candles below favour downtrends, also works as support and resistance .
This trading strategy can be traded very mechanically (see this experiment here: tradingview.com/chart/BTCUSD...) But I don't advice to do that, use it along with other indicators to make better decisions ( RSI for example) or volume of the trends and the end of them. Also, you can use higher timeframes to understand better the context.