DAS Replay — Notes from the deskReplay mechanics, fill-engine internals, scanner research, and what we are building next.https://dasreplay.com/en-usBar Replay vs. a Real Replay Desk: What Each One Can Actually Teach Youhttps://dasreplay.com/blog/bar-replay-vs-replay-desk/https://dasreplay.com/blog/bar-replay-vs-replay-desk/Chart replay tools and execution replay desks solve different problems. Knowing which problem you have saves you months of practicing the wrong thing.Fri, 31 Jul 2026 00:00:00 GMTtoolspracticeexecutionSlippage Has Three Sources, and They Need Three Different Fixeshttps://dasreplay.com/blog/day-trading-slippage-three-sources/https://dasreplay.com/blog/day-trading-slippage-three-sources/One slippage number tells you nothing. Split it into chasing, late entry, and spillover, and each piece points at a specific thing you did wrong.Fri, 31 Jul 2026 00:00:00 GMTexecutionslippagefillsWhy Paper-Trading Fills Liehttps://dasreplay.com/blog/why-paper-trading-fills-lie/https://dasreplay.com/blog/why-paper-trading-fills-lie/Paper trading fills you at the price you asked for. Real markets don't. Here's the specific machinery a paper account skips, and what it does to your read of your own edge.Fri, 31 Jul 2026 00:00:00 GMTexecutionpaper-tradingfillsWhy Your Limit Order Didn't Fillhttps://dasreplay.com/blog/why-your-limit-order-didnt-fill/https://dasreplay.com/blog/why-your-limit-order-didnt-fill/The price touched your limit. Shares printed there. You got nothing. The answer is queue position, and it's the least understood mechanic in day trading.Fri, 31 Jul 2026 00:00:00 GMTexecutionorder-typesfills