The daily chart is the best timeframe for inside bars, with 4-hour and weekly charts as strong alternatives. Inside bars work best on the daily chart time frame, primarily because on lower time frames there are just too many inside bars and many of them are meaningless and lead to false breaks.
The inside bar is best on higher timeframes; the 4-hour, daily, and weekly charts are best because the signals on these charts are more reliable, while 1-minute or 5-minute charts give too many false signals.