No. All calculations and alert triggers enforce closed-bar confirmation using barstate.isconfirmed. However, different people have different definitions of the idea of “rapainting”. If you strictly compare real time results to historical results over the same time frame, there will be differences, but these are because of how TradingView handles the data differently, not because of how our indicators work.

QuantView indicators and alert webhooks run on any TradingView tier, including Essential and Plus accounts. The primary difference is how much data you get to test with. QuantView itself runs on a one minute chart, and on our Essential account we get about 3 weeks of historical data to work with, and much much more replay data. For individual user use, I would say the Essential account is fine.

Yes and No. TradingView alerts execute in the cloud and dispatch JSON webhooks directly to your webhook server. As such, you do not need to leave TradingView running on your computer. However, a webhook server (which we can provide) does have to be running somewhere to catch those alerts, transform them, and forward them to your broker via their API. That server can run on your own machine, on a VPS in the cloud, or via some online service, and will need to be running anytime you are doing automated trading.