XRPBTC Gravestone Doji

Gravestone Doji - ' A gravestone doji is a bearish reversal candlestick pattern formed when the open, low, and the closing prices are all near each other with a long upper shadow. A gravestone doji is a bearish pattern that suggests a reversal followed by a downtrend in the price action' If anyone knows the best timeframes used for these dojis that would be helpful.