Nanex looks great, i contacted them, but its way out of my budget currently.
I thought it was from $250 which is cheaper than the iqfeed and api.
You can use dxfeed for Motivewave or Quantower. The costs are $29 per month. But dxfeed offers only data for Nasdaq and not for other exchanges.IQFeed will work for 1s bars, definitely. So will most other "real time" sources - the aggregation is usually something like half a second or less. DXFeed seems to be a tick feed as well, not sure if it is available to individuals.
I´m using Motivewave with IB´s datafeed for stocks and noticed sometimes tiny differences in the values of the 2 minute candles. Sometimes the high or low differ for 1 cent. I checked this on the charts of TOS and Tradingview. This might be because of the 250ms tick data.Whoa... why are they "wrong?" Are you sure you're calculating them properly? As you say, IB data U.S. equity data runs at 250ms tick times: 4 per second, and this price point is a Volume-Weighted Average Price (VWAP) of the previous 250 price points. IB streams accurate 250ms VWAP price points. You can't just compute a simple average across the four points in a second. Perhaps this is why your calculated bars were wrong? You must also receive total volume for each 250ms time, and calculate another VWAP of these four VWAP'd data points for a proper 1s bar.
DXFeed also has full CTAUTP feed available (for more than $29). I am getting to know DXFeed intimatelyYou can use dxfeed for Motivewave or Quantower. The costs are $29 per month. But dxfeed offers only data for Nasdaq and not for other exchanges.
since I am implementing it in Medved Trader currently.