Server uptime is the percentage of time a hosting service is operational (up). It is usually expressed as a percentage like 99.9% uptime. In forex hosting, a high uptime guarantee (e.g. 99.9% or better) is critical because even short downtime can cause missed trades or losses. For context, 99.9% uptime corresponds to only about 43 minutes of downtime per month. Reputable Forex VPS and dedicated server providers back this with SLAs (service-level agreements) promising that level of availability. Traders should look for hosts that maintain strict uptime, as a constant connection is needed for real-time price data and order execution.

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