~~Xplanation given by my broker [sanfords] is that,,'XT's are...

~~Xplanation given by my broker [sanfords] is that,,
'XT's are trades between 2 existing clients,,pre-determined buy/sell amounts/prices.
Difficult to get more detailed information but what puzzles me is the fact that several of my trades [both buy and sell] have shown up ,on-screen,with XT alongside ,when I've come to no such ;arrangement',,,and wud find this xtremely difficult to arrange as I know of not a single soul who trades via Sanfords???My personal view is that XT are a form of market manipulation,,,which now accounts for huge volumes of trades 'negotiated' !!scanno.
p.s. Please don't mention "liquidity"!