why does the johansen test fail do pairs have to pass pp test can two pairs of data pass johansen test? why can't a pair pass johansen when two pairs of data must pass two tests, they can't be cointegrated what tests to pass for pairtrading why can't two pairs pass the johansen test why pp test fails which test is required for pairtrading why can't two pairtradings pass johansen test which test can two pairs fail why can't i test for pairtrading why do a pair need to pass two tests why is pp test not pass in pairtrade why can't two pairs pass johansen test why can't pairtrading pass why can't pairtrader pass ppa test why can't pair pairs pass johansen test do pairtrading data have to pass p.p test why can't a test pass johansen