Algo or Butter fingers?

Here are 2 trades we picked up this morning on the BankNifty

The market was trading at 8634, when we noted heavy volumes at 8542, about a 100 points below.

Next it seems they covered with same volumes at 8526.

The third trade was back at 8634

All 3 trades took one sec to finish and were done at 10: 50: 26 and 10:50:27.

Butter fingers again?