UDP Export
The bot can export market data: 5-minutes candles and trades for all active markets (BTC, USDT or ETH) to the local UDP port (IP 127.0.0.1).
The bot can also accept signals sent to UDP port.
This function is currently in beta testing.
To turn it on go to the Settings -> Advanced tab, put the checkbox “UDP Export”
The bot is sending market data in binary format, as arrays of count elements in each UDP packet (look format below) to the UDP port 2000. Use buffer size=65000. Candles are sent as whole array (up to 500 elements) once in 5 minutes. Trades are only new since last update but note that 1 data packet may contain more then 1 trade.
The bot is listening for signals on UDP port 1999, signals should be sent in plain text format. Received signals are handled in the bot buy special “UDP” strategy: (Dont forget to turn on Settings -> Advanced -> “UDP Export” checkbox):
Signal example: ‘Key=Test1 Coin=NEO Order=buy BuyPrice=0.0071’.
Parameters:
Code example: (download source with small compiled demo)
// structures
TOrderType = (O_SELL,O_BUY,O_BuyStop);
TUpdateKind = (UK_Candles, UK_Trades);
TUpdateHeader = packed record
Version: byte; // 1 byte – packet version, currently 1
TimeStamp: dword; // 4 bytes – Unix timestamp
Kind: TUpdateKind; // 1 byte – candles (0) or trades (1) inside
Coin: string[7]; // 7 bytes – coin ticker name
Count: word; // 2 bytes – elements count in the data array
reserved1: dword; // 4 bytes currently unused
reserved2: dword; // 4 bytes currently unused
end;
TTradeOrder = record // 8-bytes aligned
ID: integer;
Time: TDateTime;
Price: double;
Quantity: double;
BuyerID: integer;
reserved: integer;
OrderType: TOrderType;
FillType: byte; // 0 – PARTIAL, 1 – FULL
end;
TCandle = record
OpenP,CloseP,MaxP,MinP: double;
Vol: double;
Time: TDateTime;
end;
TTrades = array of TTradeOrder;
TCandles = array of TCandle;
// Data reading and handling
procedure TfrmUDPTest.IdUDPServer1UDPRead(AThread: TIdUDPListenerThread;
const AData: TIdBytes; ABinding: TIdSocketHandle);
var
hdr: TUpdateHeader;
Trades: TTrades;
Candles: TCandles;
begin
move(AData[0], hdr, SizeOf(hdr));
If hdr.Kind = UK_Trades then begin
SetLength(Trades, hdr.Count);
move(AData[SizeOf(hdr)], Trades[0], hdr.Count * SizeOf(TTradeOrder));
If SelectedCoin = hdr.Coin
then lPrice.Caption:=hdr.Coin + ‘ Last: ‘ + FloatToStr(Trades[hdr.Count – 1].Price);
end;
f hdr.Kind = UK_Candles then begin
SetLength(Candles, hdr.Count);
move(AData[SizeOf(hdr)], Candles[0], hdr.Count * SizeOf(TCandle));
lLastCandle.Caption:=’ Last candle: ‘ + hdr.Coin + ‘ 5m vol: ‘ + FloatToStr(Candles[hdr.Count – 1].Vol);
end;
lLastTrade.Caption:=Format(‘Last update: %s time: %d’, [hdr.Coin, hdr.TimeStamp]);
end;