Interpretation of MACD

Here’s what I do most of the time:

I sit behind my computer;
[ol]
[ul]
[li]Inform myself of the daily news;
[/li][li]Look like a hawk to the upcoming trends, draw lines, decide my strategy of the day;
[/li][li]Interprete candlesticks as far as I can;
[/li][li]Then wait for the magic combination of RSI = 50 + Stoch <30 or > 70 + MACD indicating a new trend
[/li][/ul]
[/ol]

Recently there was this huge opportunity but I did not take the chance because it was in the middle of a trend. So my question is, how should I interprete the MACD?

Many thanks,

Annemie