Picture this. SPY has been drifting sideways all morning, you’ve got your support and resistance lines drawn, and then price slams straight through a level that looked rock solid ten minutes ago. Or it stalls dead at a number that, on your chart, meant nothing at all. You stare at the screen and wonder what everybody else can see that you can’t. That feeling is the reason I wanted to write this SweepAlgo review. SweepAlgo is a web dashboard that shows gamma exposure (GEX) data for SPY, QQQ and IWM, laid out as a strike-by-strike heatmap with levels like the Gamma Wall, Call Wall, Put Wall and Max Pain marked for you. I went through the official sales page carefully, and below I’ll explain what the tool does, who it’s built for, what I like about it, and the things you should know before you pay for anything. If you trade index ETF options and you’re curious about gamma levels, keep reading. If you’d rather just see how the dashboard looks, there’s a link a little further down. The Problem: Your Chart Only Shows Half the Story Most retail traders learn the same toolkit. Moving averages, trend lines, previous highs and lows, maybe some volume profile. These are useful, but they all share one limitation. They’re built from what price already did. Options traders have an extra layer to deal with. Behind every price move in SPY, QQQ or IWM sits a huge web of option contracts, and the people on the other side of those contracts, the market makers, have to manage their own risk as price moves. That hedging activity can push price around. Sometimes it calms things down, and sometimes it makes moves bigger and faster. If you can’t see that layer, you’re trading half blind. You might buy a call right under a level where lots of option positioning is stacked against you. You might hold a short-dated position through a stretch where hedging flows are speeding things up. And when the trade goes wrong, you’re left asking why it behaved nothing like your chart said it would.