Indeed. If the market trend that day is bullish but the mini sp opens with a large gap up .... Save your fishing rod. It will go tomorrow.
Take it from a 7 day a week fisherman...better to understand the wind and know how to read the water, then decide where and when to cast your line...the wind can be your friend or enemy if you know how to use it.
To fall on the rocks if you can go another day. Better sunny days with a cold beer next door. On good fishing days, the fish come alone.