Risk Management
A stop-loss (SL) is a pre-set price at which a position is closed automatically to cap the loss if the market moves against you; it is placed as a resting order on the exchange or broker, so it works even when your platform, computer or internet connection is offline.
A stop-loss defines your risk before the trade starts. Without one, the loss on a position is limited only by your margin (and, on leveraged futures, by the liquidation price), which is rarely the amount you meant to risk. It also makes position sizing possible: if you know the distance from entry to stop, you can choose a size so that the loss equals a fixed fraction of the account. A trade without a stop has no defined risk and therefore no correct size.
On AlgoVesta the stop-loss is placed on the venue itself, not just tracked in software. For crypto futures it is a reduce-only stop order on the exchange; for MetaTrader 5 it is the SL field of the position. The level comes from the signal when the channel posts one, or from your own fallback rule (a fixed number of pips or a percentage from entry). For forex accounts the platform refuses to open a trade for which neither a stop-loss nor a take-profit can be determined, and if a stop cannot be confirmed on the terminal after the order fills, the position is closed again by design. Optional rules move the stop to break-even after the first target or trail it as price advances. Stops are shown in the dashboard exactly as the venue reports them, without rounding. See crypto automation and Forex on MetaTrader for the settings.
A trader opens a long on BTCUSDT at 60,000 with the stop at 59,400 (1% below entry). With a rule of risking $50 per trade, the position size is $50 / $600 = 0.083 BTC of notional exposure. If price falls to 59,400 the exchange closes the position and the loss is about $50 plus fees and any slippage, regardless of what happens to the trader's connection in the meantime.