Back tested using R of your strategy of buying @ price above MA13 and MACD > MACD previous.
Based on assumption of 0 trading fees and all in and out:
For 000001.ss daily data downloaded from Yahoo from 1990 - today: gaining of 120 times with 433 tradings
For SPX daily from 1995 to today, gaining only 1.01 times (no gaining) with 544 tradings.
Conclusion: for China stock, your strategy works, but not for US stock market.