Madro has several things to it, the general trend is at the bottom in blue or red. The other is how strong that trend is, amber for buy, grey for sell. It's also got the arrows for entry/exit and an audio which I've turned off my personal use.

OK, when you see the road crossing the red, white and blue patriot lines and staying on one side then its time to trade. If you're below the red patriot line its time to keep and eye for sells, above the blue its time to keep an eye for buys.

If you scroll back through history you'll notice the farther away the road is from the patriot lines the more reliable the trend is.

Also, notice that when the price action goes off the road, it tends to want to go back on the road, unless its on a really long extended trend up or down. Usually you'll see that on the longer 1h and 4h trends.

The cool thing is you can go down to 1 minute and still make some sense of what to do, which you can't do with a lot of manual trading systems, they fall apart or need to be reset for the 1 minute.

Hope this helps!