On Tradingview.com, you can place any type of trade alert to be sent via email and on their app. But on a free account, you can only have 1 active alert.
You can avoid upgrading your account there and save money if you download any Metatrader 4 software. With it, you can only set price alerts but they’re unlimited and free. Then, add an alert that is unrelated to price (eg. crossing trend line) on TradingView.
To download one, you’ll need to find a reputable broker to invest your money with. I’ll save you time and research by recommending CryptoRocket, an ECN broker with low spreads, fast deposit/withdrawal and trade options like cryptocurrency, stocks, indices, and forex.
Sign up for an account and follow their instructions before you can download their MetaTrader 4 software to your desktop.