Upvote:3
What they are looking for is a stable, explained income which exceeds the reasonable expenses. They expect tourists to pay for a vacation out of their salary (or, for young people, from the parents or similar relatives), not with money arriving out of thin air. And they expect business travelers to be in a stable economic situation.
This pattern is more important than the balance. Can you show a good income/expenditure pattern with your bank statements?
This question talks about the UK, but the principle is the same.