WHY LTCBTC goes down when BTC gained 50%?

OK, i checked the last chart of LTCBTC, BTCUSD an LTCUSD and find simmiliar scenario as today.
LTCBTC was on downtrend even the BTCUSD gained 50% and LTCUSD just maybe 5% the ratio went down to 0.01831 when BTC sellers started taking profits and maybe more of them switched to LTC so they could gain another 40%...very smart. there was no darkcoin, no asics on litecoin and no high difficulty...