To determine trend, just see if the chart is going from, as Denis Gartman loves to term, 'the upper left to lower right' or 'lower left to upper right.'
You'll have to take your trade time frame and zoom out. So daytraders who trade by the 1 min charts have a downtrend today in the SPY, for example. The chart clearly goes from the upper left to the lower right. Zoom out to the 10 min chart and it looks virtually trendless, but you'll see the downtrend has run into possible resistance on yesterday's low with another potential level of support not much further off on Friday's lows. Zoom out to the 30 and 60 min charts and you'll see there is a clear 'lower left to upper right' moving chart. Skipping all the way to the monthly chart you'll see we're near the '07 highs, but if you trade on a 1, 5, 10 etc minute time frame, are you going to start shorting now even though that resistance is 80 or so points away? I'm trying not to get long winded here, but determine the trend on the 60min, daily and weekly charts, then zoom out to make sure your trend isn't going to run into a long term resistance.
Looking back on prior posts, I sound market bullish. Does that mean I believe all is hunky dory in the world? Of course not. In fact, I am a huge bear when it comes to the macro economic situation. The US is not recovering jobs, despite the BLS. Just look at the tax receipts - they may be up, but are they still up if you adjusted for the local increases? Housing is a mess, shadow inventory is not reported, banks are not marking to market, etc. Japan is still now into its 3rd lost decade and reaching over 200% debt to GDP. China, who's real estate market is about to monumentally collapse, is now suffering from the European recession as they are China's number 2 customer. That will lead to reduced demand for resources, so Australia (another housing collapse victim) will suffer as well as Canada.
BUT, all that news matters when it matters. We are not here to trade our opinions. That is what is going to separate those who make it from those who either spin their wheels for years getting flat pnl or, even worse, those who bomb out.