Crypto data quality varies more than people expect

Same asset, different venue, genuinely different data. Not just price by a few basis points. Different tick frequency, different behavior during fast moves, different handling of outliers. The practical consequence is that a threshold tuned on one venue's feed can be wrong on another, and you won't notice because the price series look similar at a glance. If you research on one source and trade on another, at minimum compare the two over a volatile hour before you trust anything.