OBV: The OBV is perfect indicator to understand the strength of the particular stock. As the strength increase, the trend of the stock goes high along with price. But, the OBV is considered only with close of previous close which is to make sure the double confirmation on the price to accumulate the volume.
Altered OBV: So, here is the altered OBV, which basically consider the close of previous close and also buying interested of the day when close is higher than open.
MACD: I always admire the magic of MACD with pre-defined timeframe. Now, this MACD applied on top of altered OBV to signal us the moving of the ticker strength.
I hope the another MACDAltOBV would help on your swing trading strategy.