Look, it's also pennant in the down-trend or bear flag. For both USOIL and UKOIL they continue for 2 weeks, and as per definition are pennants, but not triangles, google it. They look similar, but formally different objects.
But your ideas are very good, both USOIL and UKOIL are highly correlated objects.
rv
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USOIL is seemingly closing above the trend_line. thus invalidating the descending triangle pattern Hence the long position. UKOIL could be seen as a pennant here, yes. thanks for the comments. :)