Are there alternatives to market replay in Ninja trader? What other platforms will do it? Ninja trader has bugs, but is still better than esignal, sierra charts and definitely multi charts.
you may want to check out tradelink. tradelink is open source, supports 15+ brokers and feeds and has many different simulation and replay functions. the 'replay' application can be used for discretionary multi-symbol replaying. google tradelink project or tradelink.org for more info