GBPJPY 14-20 [JAN] Analysis - Sharkfin on 4H?

Here we can see sharkfin on a 4H below 25 i.e. 18 with price action sitting on strong support. We can anticipate a long setup if the PA retest this support and it holds? Thoughts? Can we use TDI Sharkfin on 4H?
GBPJPYgbpjpylongTrend Analysis

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