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const url=`https://datafeed.dukascopy.com/datafeed/${pair}/${p.y}/${p.m}/${p.day}/${p.h}h_ticks.bi5`;\n let res:Response|null=null;\n for(let attempt=0;attempt<5;attempt++){\n res=await fetch(url);\n if(res.ok||res.status===404) break;\n if(res.status===503||res.status===429){await new Promise(r=>setTimeout(r,300*(attempt+1)));continue;}\n break;\n }\n if(!res)throw new Error(`no response`); if(res.status===404)return []; if(!res.ok)throw new Error(`${pair} ${new Date(hourMs).toISOString()} ${res.status}`);\n const compressed=new Uint8Array(await res.arrayBuffer()); const raw=decompress(compressed); const bytes=raw instanceof Uint8Array?raw:new Uint8Array(raw); if(bytes.length%20!==0)throw new Error(`bad bi5 length ${bytes.length}`);\n const dv=new DataView(bytes.buffer,bytes.byteOffset,bytes.byteLength); const scale=pair.endsWith(\"JPY\")?1000:100000; const out:Tick[]=[];\n for(let off=0;off=hourMs+3600000)throw new Error(`tick outside requested hour`);\n out.push({t,ask,bid,spread:(ask-bid)*100});\n }\n return out;\n}\nfunction agg15(ticks:Tick[]):Bar[]{\n const m=new Map();\n for(const x of ticks){\n const s=Math.floor(x.t/900000)*900000; let b=m.get(s);\n if(!b){b={start:s,o:x.bid,h:x.bid,l:x.bid,c:x.bid,n:0,askO:x.ask,askH:x.ask,askL:x.ask,askC:x.ask,bidO:x.bid,bidH:x.bid,bidL:x.bid,bidC:x.bid,spreadSum:0};m.set(s,b);}\n b.h=Math.max(b.h,x.bid); b.l=Math.min(b.l,x.bid); b.c=x.bid;\n b.askH=Math.max(b.askH,x.ask); b.askL=Math.min(b.askL,x.ask); b.askC=x.ask;\n b.bidH=Math.max(b.bidH,x.bid); b.bidL=Math.min(b.bidL,x.bid); b.bidC=x.bid;\n b.n++; b.spreadSum+=x.spread;\n }\n return [...m.values()].sort((a,b)=>a.start-b.start);\n}\nfunction median(a:number[]):number|null{if(!a.length)return null;const b=[...a].sort((x,y)=>x-y),m=Math.floor(b.length/2);return b.length%2?b[m]:(b[m-1]+b[m])/2;}\nfunction linR2(v:number[]):number|null{if(v.length<3)return null;const n=v.length,mx=(n-1)/2,my=v.reduce((s,x)=>s+x,0)/n;let xx=0,yy=0,xy=0;for(let i=0;ib[i-1].h&&b[i].h>b[i-2].h&&b[i].h>b[i+1].h&&b[i].h>b[i+2].h)highs.push(i);if(b[i].l=1;k--)hours.push(t0-k*3600000);\n const chunks:Tick[][]=[]; const requestManifest:string[]=[];\n for(const h of hours){const p=partsForHour(h);requestManifest.push(`https://datafeed.dukascopy.com/datafeed/${w.pair}/${p.y}/${p.m}/${p.day}/${p.h}h_ticks.bi5`);chunks.push(await fetchHour(w.pair,h));await new Promise(r=>setTimeout(r,100));}\n const ticks=chunks.flat().sort((a,b)=>a.t-b.t); if(!ticks.length)throw new Error(`no ticks ${w.idx}`); if(ticks[ticks.length-1].t>=t0)throw new Error(`LEAK ${w.idx}`);\n const bars=agg15(ticks); const expectedFirst=t0-8*3600000; const barStarts=new Set(bars.map(b=>b.start)); let missing=0; for(let s=expectedFirst;sb.c); const last=bars[bars.length-1]; const trs:number[]=[]; for(let i=0;is+x,0)/Math.min(14,trs.length); const p=pivots(bars); let er:number|null=null; if(closes.length>=25){const q=closes.slice(-25);let den=0;for(let i=1;icloses.length>barsN?(last.c-closes[closes.length-1-barsN])*100:null; const spreads=ticks.map(x=>x.spread);\n const range=(Math.max(...bars.map(b=>b.h))-Math.min(...bars.map(b=>b.l)))*100; const lo=Math.min(...bars.map(b=>b.l)); const hi=Math.max(...bars.map(b=>b.h));\n return {idx:w.idx,date:w.date,pair:w.pair,isel_confidence:w.iselConfidence,t0_utc:new Date(t0).toISOString(),requested_hours:hours.length,first_hour:new Date(hours[0]).toISOString(),last_requested_hour:new Date(hours[hours.length-1]).toISOString(),last_tick:new Date(ticks[ticks.length-1].t).toISOString(),leak_check:ticks[ticks.length-1].ts+x,0)/spreads.length,3),median_spread_pips:rnd(median(spreads),3),first_bar:bars.length?barDTO(bars[0]):null,last_bar:bars.length?barDTO(last):null,pivot_high_bars:p.highs.map(i=>barDTO(bars[i])),pivot_low_bars:p.lows.map(i=>barDTO(bars[i])),bars:bars.map(barDTO),request_manifest:requestManifest,source_rule:\"ONLY UTC hour files [t0-8h, t0); t0 hour file never requested; BID geometry / ASK+BID preserved\"};\n}\n\nexport async function computeWindow(idx:number){const w=WINS.find(x=>x.idx===idx);if(!w)throw new Error(`bad idx ${idx}`);return {protocol:{source:\"Dukascopy .bi5\",window:\"8h pre-t0 selected-pair diagnostic\",geometry_price:\"BID\",execution_fields:\"ASK+BID preserved\",leak_barrier:\"only files with hour_startx.idx===idx); if(!w) throw new Error(`bad idx ${idx}`); if(block!==0&&block!==1) throw new Error(`bad block ${block}`);\n const t0=Date.parse(w.date+\"T00:00:00Z\");\n const ks=block===0?[8,7,6,5]:[4,3,2,1]; const hours=ks.map(k=>t0-k*3600000);\n const manifest=hours.map(h=>{const p=partsForHour(h);return `https://datafeed.dukascopy.com/datafeed/${w.pair}/${p.y}/${p.m}/${p.day}/${p.h}h_ticks.bi5`;});\n const chunks:Tick[][]=await Promise.all(hours.map(h=>fetchHour(w.pair,h)));\n const ticks=chunks.flat().sort((a,b)=>a.t-b.t); if(!ticks.length)throw new Error(`no ticks ${idx}/${block}`); if(ticks[ticks.length-1].t>=t0)throw new Error(`LEAK ${idx}/${block}`);\n const bars=agg15(ticks); 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