Need quick software recommendation

I'm looking for inexpensive or free charting software (delayed or real-time) where you can expand and contract the chart up and down by dragging your mouse, I know this is very typical of most decent platforms but the good ones like TradeStation and ESignal charge too much money. I'm not going to be trading much so I can't really offset the cost with a brokerage account. I need something where you can save trendlines too. Any recommendations?
 
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