I used to just log on to Ample(formerly iii.co.uk) for a portfolio of LSE EOD prices.
Having now looked at other software with improved charting capabilities eg esignal and sierra charts/mytrack i notice that very often there is no agreement between all of them regarding EOD bid and offer prices and % gain/loss.
How does one treat/explain these differences?Is there a 'right one'and a wrong one or does one software have later -out of market hours-data than the other?If so which one?Is the % move always based on yesterdays close to today's close or is other data used eg last price.How does one therefore have confidence in a potential chart based on these different data given each would produce different results?
Thanks in advance for your time,
David.
Having now looked at other software with improved charting capabilities eg esignal and sierra charts/mytrack i notice that very often there is no agreement between all of them regarding EOD bid and offer prices and % gain/loss.
How does one treat/explain these differences?Is there a 'right one'and a wrong one or does one software have later -out of market hours-data than the other?If so which one?Is the % move always based on yesterdays close to today's close or is other data used eg last price.How does one therefore have confidence in a potential chart based on these different data given each would produce different results?
Thanks in advance for your time,
David.
