NEW YORK (TheStreet) -- Macau is perhaps the world's largest gambling region and the only place in China where it is legal. Stanley Ho dominated the field until 2002 when U.S. casino companies were able to enter. Casino stocks with interests in Macau have been trading near multi-year lows, but that doesn't mean the odds are against a turnaround.

Wynn Resorts  (WYNN - Get Report) is down 70% from its March 2014 high, and the chart above shows the downtrend still intact. Since May, each decline in WYNN as been on weaker momentum readings, and the rate of decline in WYNN is slowing. While there is no reversal pattern yet, the odds favor that this house should break higher.

Las Vegas Sands  (LVS - Get Report), above, has given back more than half its winnings, but for the past 12 months the rate of decline in LVS has been slowing. Momentum (the chart in the lower part of the graph) is a leading indicator and its timing is imprecise. Prices can be "due" for a reversal for a long time.

Like the two other stocks highlighted here -- WYNN and LVS -- the chart of Melco Crown Entertainment  (MPEL) is also in a downtrend losing some 80% of its prior advance. In the chart below, we can see the same setup with prices making new lows for the move down, but momentum making higher lows since May of this year.

Instead of letting your next investment in gaming stocks run into a streak of bad luck, enter a sell stop for all your long positions.