After reaching an important support level, Petrobras (PBR Quick QuotePBR - Free Report) could be a good stock pick from a technical perspective. PBR surpassed resistance at the 20-day moving average, suggesting a short-term bullish trend.

The 20-day simple moving average is a popular investing tool. Traders like this SMA because it offers a look back at a stock's price over a shorter period and helps smooth out price fluctuations. The 20-day can also show more trend reversal signals than longer-term moving averages.

The 20-day moving average can show signals that are similar to other SMAs as well. If a stock's price is moving above the 20-day, the trend is considered positive. When the price falls below the moving average, it can signal a downward trend.

Shares of PBR have been moving higher over the past four weeks, up 6.3%. Plus, the company is currently a Zacks Rank #1 (Strong Buy) stock, suggesting that PBR could be poised for a continued surge.

The bullish case solidifies once investors consider PBR's positive earnings estimate revisions. No estimate has gone lower in the past two months for the current fiscal year, compared to 2 higher, while the consensus estimate has increased too.

With a winning combination of earnings estimate revisions and hitting a key technical level, investors should keep their eye on PBR for more gains in the near future.